Alchemical Hydra

SerpentineElectricFireExtinguished
Alchemical Hydra
Released	10 January 2019 (Update)
Members	Yes
Combat level	426
Size	6x6
Examine	A ferocious Alchemical Hydra!
Combat info
Attribute	Draconic
XP bonus	+20%
Max hit	17x2 (default); 26x2 (empowered)
Aggressive	Yes
Poisonous	Yes
Attack style	Ranged, Magic
Attack speed	6 ticks (3.6 seconds)
Respawn time	43 ticks (25.8 seconds)
Slayer info
Slayer level	95
Slayer XP	1,320 xp
Category	Hydras
Assigned by	File:Konar chathead.png
Combat stats
Aggressive stats
Melee defence
Magic defence
+150	No elemental weakness
Ranged defence
Immunities
Poison	Immune
Venom	Immune
	Open in DPS calculator
Advanced data
Monster ID	8615,8616

This fight takes place in an instance with a deathbank.

On death, you can pay Orrvor quo Maten

100,000 to retrieve lost items.
Any unsafe death will delete all items left inside the deathbank. Any items left on the ground will be lost.

This article has a strategy guide.

All information on mechanics and strategy will be on this page.

This article has a Slayer task guide here.

Information comparing locations for Slayer tasks will be on this page

SMW Subobject for SerpentineMagic defence bonus: 150Examine: A ferocious Alchemical Hydra!Immune to venom: ImmuneAttack bonus: 0Magic Damage bonus: 20Ranged Strength bonus: 20Stab defence bonus: 75Uses skill: SlayerDefence level: 100Heavy range defence bonus: 45NPC ID: 8615, 8616Crush defence bonus: 150Release date: 10 January 2019Version anchor: SerpentineRanged level: 260Attack level: 100Combat level: 426Poisonous: YesHitpoints: 1100Is variant of: Alchemical HydraImmune to poison: ImmuneMagic attack bonus: 45Experience bonus: 20Slash defence bonus: 150Range defence bonus: 45Attack style: Ranged, MagicMonster attribute: dragonLight range defence bonus: 45Image: File:Alchemical Hydra (serpentine).pngSize: 6Range attack bonus: 45Slayer category: HydrasStandard range defence bonus: 45Assigned by: konarIs members only: trueAttack speed: 6Slayer level: 95Magic level: 260Name: Alchemical HydraStrength bonus: 0Max hit: 17x2 (default), 26x2 (empowered)Strength level: 100Slayer experience: 1320Uses infobox: Monster

SMW Subobject for ElectricMagic defence bonus: 150Examine: A ferocious Alchemical Hydra!Immune to venom: ImmuneAttack bonus: 0Magic Damage bonus: 20Ranged Strength bonus: 20Stab defence bonus: 75Uses skill: SlayerDefence level: 100Heavy range defence bonus: 45NPC ID: 8619, 8617Crush defence bonus: 150Release date: 10 January 2019Version anchor: ElectricRanged level: 260Attack level: 100Combat level: 426Poisonous: YesHitpoints: 1100Is variant of: Alchemical HydraImmune to poison: ImmuneMagic attack bonus: 45Experience bonus: 20Slash defence bonus: 150Range defence bonus: 45Attack style: Ranged, MagicMonster attribute: dragonLight range defence bonus: 45Image: File:Alchemical Hydra (electric).pngSize: 6Range attack bonus: 45Slayer category: HydrasStandard range defence bonus: 45Assigned by: konarIs members only: trueAttack speed: 6Slayer level: 95Magic level: 260Name: Alchemical HydraStrength bonus: 0Max hit: 35 (default), 26x2 (empowered)Strength level: 100Slayer experience: 1320Uses infobox: Monster

SMW Subobject for ExtinguishedMagic defence bonus: 150Examine: A ferocious Alchemical Hydra!Immune to venom: ImmuneAttack bonus: 0Magic Damage bonus: 20Ranged Strength bonus: 20Stab defence bonus: 75Uses skill: SlayerDefence level: 100Heavy range defence bonus: 45NPC ID: 8621, 8622Crush defence bonus: 150Release date: 10 January 2019Version anchor: ExtinguishedRanged level: 260Attack level: 100Combat level: 426Poisonous: YesHitpoints: 1100Is variant of: Alchemical HydraImmune to poison: ImmuneMagic attack bonus: 45Experience bonus: 20Slash defence bonus: 150Range defence bonus: 45Attack style: Ranged, MagicMonster attribute: dragonLight range defence bonus: 45Image: File:Alchemical Hydra (extinguished).pngSize: 6Range attack bonus: 45Slayer category: HydrasStandard range defence bonus: 45Assigned by: konarIs members only: trueAttack speed: 4Slayer level: 95Magic level: 260Name: Alchemical HydraStrength bonus: 0Max hit: 55Strength level: 100Slayer experience: 1320Uses infobox: Monster

SMW Subobject for FireMagic defence bonus: 150Examine: A ferocious Alchemical Hydra!Immune to venom: ImmuneAttack bonus: 0Magic Damage bonus: 20Ranged Strength bonus: 20Stab defence bonus: 75Uses skill: SlayerDefence level: 100Heavy range defence bonus: 45NPC ID: 8620, 8618Crush defence bonus: 150Release date: 10 January 2019Version anchor: FireRanged level: 260Attack level: 100Combat level: 426Poisonous: YesHitpoints: 1100Is variant of: Alchemical HydraImmune to poison: ImmuneMagic attack bonus: 45Experience bonus: 20Slash defence bonus: 150Range defence bonus: 45Attack style: Ranged, MagicMonster attribute: dragonLight range defence bonus: 45Image: File:Alchemical Hydra (fire).pngSize: 6Range attack bonus: 45Slayer category: HydrasStandard range defence bonus: 45Assigned by: konarIs members only: trueAttack speed: 6Slayer level: 95Magic level: 260Name: Alchemical HydraStrength bonus: 0Max hit: 35 (default), 52 (empowered)Strength level: 100Slayer experience: 1320Uses infobox: Monster

The Alchemical Hydra is a boss version of hydra, found in the lower level of the Karuulm Slayer Dungeon in Mount Karuulm, requiring level 95 Slayer to kill. The Alchemical Hydra was the creation of a Dragonkin named Karuulm. While Karuulm saw promise in his creation, he nevertheless saw it as a failure because he could not replicate its traits, and abandoned it along with his other creations: the Wyrms, Drakes, and Hydras.

Unlike normal hydras, the Alchemical Hydra can only be killed while on a hydra Slayer task, which is only assigned by Konar. In addition, as it is only found within the volcano, players who have not completed the elite Kourend & Kebos Diary must wear boots of stone, boots of brimstone, or granite boots to protect themselves from the extreme heat of the dungeon floor. This also applies to attempting to use the Item Retrieval Service, as the rapid damage will interrupt actions and dying a second time will wipe the storage.

Along with all the unique drops obtainable from hydras, it can also drop hydra leather, which is used on the machinery south-west of the pool in the Lithkren Vault to create ferocious gloves, as well as the hydra claw, which is combined with a Zamorakian hasta to create the dragon hunter lance.

Location

Levels

Members

Spawns

Map

League region

Karuulm Slayer Dungeon (lower level)

426

1

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Monster	Alchemical Hydra
Level(s)	426

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Kourend✓

The Alchemical Hydra can be found in the lower level of the Karuulm Slayer Dungeon. Its lair is at the northern side of the dungeon, past the Tasakaal and then east past the hydras chamber. Orrvor quo Maten will be found guarding the entrance of the lair. Alternatively, with level 88 Agility the mysterious pipe shortcut just behind Kaal-Ket-Jor may be used to reach the lair safely.

Fight overview

	Alchemical Attack!
The music which plays when fighting the Alchemical Hydra.
File:Alchemical Attack!.ogg

The player fights the Hydra in an instanced room upon jumping over the rock barrier. The chamber consists of two rooms; an observation room which is safe from the Hydra, and a set of doors leading into the test chamber where the Hydra resides in. The Hydra will become aggressive and attack upon entering the test chamber, and the doors will also lock themselves. This means that the only means of escape are to either kill the boss, die, or teleportation. Players cannot log themselves out of the test chamber either.

The Alchemical Hydra has four phases throughout the fight, depending on its remaining health. It attacks with Ranged and Magic, alternating between them every three attacks for the first three phases. At the start of each phase, it has a 75% damage reduction, which can be removed if it is lured over a vent on the floor which spews chemical liquid. However, the vent must be the correct one, corresponding to the combat triangle (e.g. when it is green, red will weaken it), otherwise the Hydra's damage is increased by up to 50%.

When the Alchemical Hydra reaches or falls below 75%, 50%, and 25% of its health (that is, at 825, 550, and 275 Hitpoints), it will lose one of its heads and begin the next phase. Barring the last phase, the damage reduction is reapplied, and so it should be lured over the next vent. It also has special attacks for each phase: poison pools when green and black, electricity when blue and fire when red. These special attacks are avoidable.

In its final phase, the Hydra will alternate combat styles every attack with increased attack speed and max hit. Its first attack will always be the opposite style to what it most recently used (e.g if its last attack in phase 3 was ranged, it will start phase 4 with magic).

When the Hydra is killed, it will respawn in approximately 25 seconds, and the doors will unlock during this time.

Money making

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Drops

In addition to the 100% drop, the player will also have two rolls on the Alchemical Hydra's drop table. The first drop has a chance to be a unique, while the second is always standard. The drop rates in the drop table below reflect the chance of getting an item for every roll on the standard loot table. For example, a listed drop rate of 2/100 indicates that you have two 2/100 chances of receiving that item.^[1]

Drops remain on the ground for 3 hours, or until the player leaves the instanced area.^[2]

Drop rates estimated based on 292,738 samples from the Drop Rate Project, unless otherwise cited.

100%

	Item	Quantity	Rarity	Price	High Alch
	Hydra bones	2	Always	17,520	192

Pre-roll

Due to a unique mechanic, items are slightly rarer than officially announced. The effective rates are displayed here.^[3]

Item	Quantity	Rarity	Price	High Alch
Hydra's eye	1	1/181^{[d 1]}^[4]	Not sold	60,000
Hydra's fang	1	1/181^{[d 1]}^[4]	Not sold	60,000
Hydra's heart	1	1/181^{[d 1]}^[4]	Not sold	60,000
Hydra tail	1	1/513^[4]	91,539	60,000
Hydra leather	1	1/514^[4]	9,972,981	60,000
Hydra's claw	1	1/1,001^[4]	65,769,598	90,000
Dragon thrownaxe	500–1,000	1/2,000^[4]	184,000–368,000	225,000–450,000
Dragon knife	500–1,000	1/2,001^[4]	3,050,000–6,100,000	50,000–100,000

^ ^1.0 ^1.1 ^1.2 The order in which players receive the items is: Hydra's eye, Hydra's fang and finally Hydra's heart.

Weapons and armour

Item	Quantity	Rarity	Price	High Alch
Mystic fire staff	1	2 × 8/101^{[d 1]}	25,116	25,500
Mystic water staff	1	2 × 8/101^{[d 1]}	25,139	25,500
Battlestaff	8–12 (noted)	2 × 5/101	66,472–99,708	33,600–50,400
Black d'hide body	1	2 × 5/101	7,405	8,088
Dragon longsword	1	2 × 3/101	59,175	60,000
Dragon med helm	1	2 × 3/101	59,006	60,000
Rune platebody	1	2 × 3/101^{[d 2]}	38,507	39,000
Dragon battleaxe	1	2 × 2/101	119,456	120,000
Rune platelegs	1	2 × 1.5/101^{[d 2]}	37,847	38,400
Rune plateskirt	1	2 × 1.5/101^{[d 2]}	38,000	38,400
Mystic robe top (light)	1	2 × 1/101^{[d 3]}	71,728	72,000
Mystic robe bottom (light)	1	2 × 1/101^{[d 3]}	47,061	48,000

^ ^1.0 ^1.1 Players will receive Mystic fire staff together with Mystic water staff
^ ^2.0 ^2.1 ^2.2 Players will receive Rune platebody together with Rune platelegs or Rune plateskirt
^ ^3.0 ^3.1 Players will receive Mystic robe top (light) together with Mystic robe bottom (light)

Runes and ammunition

	Item	Quantity	Rarity	Price	High Alch
	Chaos rune	150–300	2 × 6/101	15,300–30,600	8,100–16,200
	Death rune	150–300	2 × 6/101	24,000–48,000	16,200–32,400
	Blood rune	150–300	2 × 6/101	32,100–64,200	36,000–72,000
	Astral rune	150–300	2 × 6/101	11,700–23,400	4,500–9,000
Dragonstone bolts (e).png: Alchemical Hydra drops Dragonstone bolts (e) with rarity 2 × 2/101 in quantity 100-120	Dragonstone bolts (e)	100–120	2 × 2/101	49,100–58,920	63,700–76,440
Onyx bolts (e).png: Alchemical Hydra drops Onyx bolts (e) with rarity 2 × 1/101 in quantity 35-50	Onyx bolts (e)	35–50	2 × 1/101	304,465–434,950	315,000–450,000

Herbs

There is a 10/101 chance to get noted herbs.

Item	Quantity	Rarity	Price	High Alch
Grimy avantoe	10–15 (noted)	2 × 1/64.6	32,630–48,945	100–150
Grimy kwuarm	25–30 (noted)	2 × 1/64.6	89,350–107,220	300–360
Grimy ranarr weed	10–15 (noted)	2 × 1/80.8	67,090–100,635	180–270
Grimy snapdragon	10–15 (noted)	2 × 1/80.8	82,810–124,215	120–180
Grimy cadantine	25–30 (noted)	2 × 1/80.8	74,675–89,610	325–390
Grimy dwarf weed	25–30 (noted)	2 × 1/80.8	50,900–61,080	350–420
Grimy lantadyme	25–30 (noted)	2 × 1/107.7	46,525–55,830	325–390
Grimy torstol	10–15 (noted)	2 × 1/107.7	27,920–41,880	150–225

Seeds

There is a 2/101 chance of rolling the tree-herb seed drop table.

	Item	Quantity	Rarity	Price	High Alch
Ranarr seed.png: Alchemical Hydra drops Ranarr seed with rarity 2 × 1/420.8 in quantity 2-3	Ranarr seed	2–3	2 × 1/420.8	54,596–81,894	60–90
Snapdragon seed.png: Alchemical Hydra drops Snapdragon seed with rarity 2 × 1/450.9 in quantity 2-3	Snapdragon seed	2–3	2 × 1/450.9	83,318–124,977	72–108
Torstol seed.png: Alchemical Hydra drops Torstol seed with rarity 2 × 1/573.9 in quantity 2-3	Torstol seed	2–3	2 × 1/573.9	12,762–19,143	84–126
Watermelon seed.png: Alchemical Hydra drops Watermelon seed with rarity 2 × 1/601.2 in quantity 30-45	Watermelon seed	30–45	2 × 1/601.2	1,020–1,530	990–1,485
Willow seed.png: Alchemical Hydra drops Willow seed with rarity 2 × 1/631.3 in quantity 2-3	Willow seed	2–3	2 × 1/631.3	120–180	18–27
Mahogany seed.png: Alchemical Hydra drops Mahogany seed with rarity 2 × 1/701.4 in quantity 2-3	Mahogany seed	2–3	2 × 1/701.4	2,148–3,222	56–84
Maple seed.png: Alchemical Hydra drops Maple seed with rarity 2 × 1/701.4 in quantity 2-3	Maple seed	2–3	2 × 1/701.4	9,530–14,295	56–84
Teak seed.png: Alchemical Hydra drops Teak seed with rarity 2 × 1/701.4 in quantity 2-3	Teak seed	2–3	2 × 1/701.4	98–147	56–84
Yew seed.png: Alchemical Hydra drops Yew seed with rarity 2 × 1/701.4 in quantity 2-3	Yew seed	2–3	2 × 1/701.4	52,898–79,347	170–255
Papaya tree seed.png: Alchemical Hydra drops Papaya tree seed with rarity 2 × 1/901.8 in quantity 2-3	Papaya tree seed	2–3	2 × 1/901.8	1,884–2,826	138–207
Magic seed.png: Alchemical Hydra drops Magic seed with rarity 2 × 1/1,147.7 in quantity 2-3	Magic seed	2–3	2 × 1/1,147.7	194,576–291,864	506–759
Palm tree seed.png: Alchemical Hydra drops Palm tree seed with rarity 2 × 1/1,262.5 in quantity 2-3	Palm tree seed	2–3	2 × 1/1,262.5	72,706–109,059	304–456
Spirit seed.png: Alchemical Hydra drops Spirit seed with rarity 2 × 1/1,578.1 in quantity 2-3	Spirit seed	2–3	2 × 1/1,578.1	Not sold	0
Dragonfruit tree seed.png: Alchemical Hydra drops Dragonfruit tree seed with rarity 2 × 1/2,104.2 in quantity 2-3	Dragonfruit tree seed	2–3	2 × 1/2,104.2	351,154–526,731	516–774
Celastrus seed.png: Alchemical Hydra drops Celastrus seed with rarity 2 × 1/3,156.3 in quantity 2-3	Celastrus seed	2–3	2 × 1/3,156.3	138,642–207,963	648–972
Redwood tree seed.png: Alchemical Hydra drops Redwood tree seed with rarity 2 × 1/3,156.3 in quantity 2-3	Redwood tree seed	2–3	2 × 1/3,156.3	40,568–60,852	780–1,170

Other

Item	Quantity	Rarity	Price	High Alch
Coins	5,550–25,550	2 × 0.5/101	5,550–25,550	5,550–25,550
Coins	40,000–60,000	2 × 9.5/101	40,000–60,000	40,000–60,000
Shark	2–4	2 × 7/101	1,750–3,500	204–408
Ranging potion(3)	1	2 × 7/101^{[d 1]}	1,821	172
Super restore(3)	2	2 × 7/101^{[d 1]}	16,398	288
Dragon bones	30 (noted)	2 × 6/101	94,920	2,880
Crystal key	1	2 × 1/101	25,297	90

^ ^1.0 ^1.1 Players will receive Ranging potion(3) together with two Super restore(3)

Rare drop table

There is a 1/101 chance of rolling the rare drop table. This will give the player two rolls on the rare drop table

	Item	Quantity	Rarity	Price	High Alch
	Nothing	N/A	2 × 1/556.67; Never^{[d 1]}	N/A	N/A
	Coins	3,000	2 × 1/615.62	3,000	3,000
	Loop half of key	1	2 × 1/641.39; 1/636.61^{[d 2]}	11,919	60
	Tooth half of key	1	2 × 1/641.39; 1/636.61^{[d 2]}	11,925	60
	Uncut sapphire	1	2 × 1/2,585.6; 1/1,313^{[d 2]}	238	15
	Runite bar	1	2 × 1/2,585.6	12,467	3,000
	Nature rune	67	2 × 1/4,309.33	7,169	7,236
	Rune 2h sword	1	2 × 1/4,309.33	37,885	38,400
	Rune battleaxe	1	2 × 1/4,309.33	24,300	24,960
	Uncut emerald	1	2 × 1/5,171.2; 1/2,626^{[d 2]}	463	30
	Law rune	45	2 × 1/6,464	5,715	6,480
	Death rune	45	2 × 1/6,464	7,200	4,860
Steel arrow.png: Alchemical Hydra drops Steel arrow with rarity 2 × 1/6,464 in quantity 150	Steel arrow	150	2 × 1/6,464	2,700	1,050
Rune arrow.png: Alchemical Hydra drops Rune arrow with rarity 2 × 1/6,464 in quantity 42	Rune arrow	42	2 × 1/6,464	2,352	10,080
	Adamant javelin	20	2 × 1/6,464	1,140	1,920
	Rune sq shield	1	2 × 1/6,464	22,551	23,040
	Dragonstone	1	2 × 1/6,464	11,580	6,000
	Silver ore	100 (noted)	2 × 1/6,464	6,500	4,500
	Uncut ruby	1	2 × 1/10,342.4; 1/5,252^{[d 2]}	988	60
	Rune kiteshield	1	2 × 1/12,928	32,131	32,640
	Dragon med helm	1	2 × 1/12,928	59,006	60,000
	Rune spear	1	2 × 1/13,647.7; 1/1,583.52^{[d 2]}	11,871	12,480
	Shield left half	1	2 × 1/27,295.41; 1/3,167.04^{[d 2]}	65,394	66,000
	Nature talisman	1	2 × 1/27,579.73; 1/14,005.33^{[d 2]}	328	2
	Dragon spear	1	2 × 1/36,393.87; 1/4,222.71^{[d 2]}	38,854	37,440
	Uncut diamond	1	2 × 1/41,369.6; 1/21,008^{[d 2]}	2,142	120
	Rune javelin	5	2 × 1/82,739.2; 1/42,016^{[d 2]}	950	1,200

^ The "nothing" drop is removed while wearing a ring of wealth.
^ ^2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.

Tertiary

	Item	Quantity	Rarity	Price	High Alch
Brimstone key.png: Alchemical Hydra drops Brimstone key with rarity 1/40 in quantity 1	Brimstone key	1	1/40	Not sold	N/A
	Clue scroll (hard)	1	1/100^{[d 1]}^[4]	Not sold	12
	Alchemical hydra heads	1	1/256^[4]	Not sold	30,000
	Clue scroll (elite)	1	1/256^{[d 2]}^[4]	Not sold	12
	Jar of chemicals	1	1/2,000^[4]	111,916	0
	Ikkle hydra	1	1/3,000^[4]	Not sold	N/A

^ The hard clue scroll drop rate increases to 1/95 after unlocking the hard Combat Achievements rewards tier.
^ The elite clue scroll drop rate increases to 1/243 after unlocking the elite Combat Achievements rewards tier.

Combat Achievements

There are 0 Combat Achievement tasks (totalling 0 points) available for Alchemical Hydra.

Name	Description	Type	Tier	Comp%

Gallery

A concept of the Alchemical Hydra shown during RuneFest 2018.
A teaser image of the Alchemical Hydra in an area resembling Dragonkin architecture
The decapitation of one of the boss's heads, created by Mod Ghost
A piece of official artwork depicting the Alchemical Hydra.
The Alchemical Hydra Steam Trading Card.

Dialogue

This article on an NPC has an associated dialogue page.
Click here for a transcript of possible conversations with this NPC.Expression error: Unrecognised word "span".

Changes

Date	Changes
[[{{#explode:9 March 2022\| \|0}} {{#explode:9 March 2022\| \|1}}]] [[{{#explode:9 March 2022\| \|2}}]] (update)	Certain Combat Achievement tasks now perform their checks correctly in the final phase of the Alchemical Hydra fight.
[[{{#explode:26 August 2021\| \|0}} {{#explode:26 August 2021\| \|1}}]] [[{{#explode:26 August 2021\| \|2}}]] (update)	Alchemical Hydra's animation issues have been fixed.
[[{{#explode:14 July 2021\| \|0}} {{#explode:14 July 2021\| \|1}}]] [[{{#explode:14 July 2021\| \|2}}]] (update \| poll)	The Alchemical Hydra now has an animation to indicate it changing attack styles.
[[{{#explode:13 June 2019\| \|0}} {{#explode:13 June 2019\| \|1}}]] [[{{#explode:13 June 2019\| \|2}}]] (update)	Players can no longer logout in the Alchemical Hydra room due to an issue where players trying to log out in the room kept getting stuck in a state where they couldn't attack the boss but it kept trying to attack them.
[[{{#explode:7 February 2019\| \|0}} {{#explode:7 February 2019\| \|1}}]] [[{{#explode:7 February 2019\| \|2}}]] (update \| poll)	The alchemical hydra heads were added as a possible tertiary drop.
[[{{#explode:31 January 2019\| \|0}} {{#explode:31 January 2019\| \|1}}]] [[{{#explode:31 January 2019\| \|2}}]] (update)	The jar of chemicals was added as a possible tertiary drop.
[[{{#explode:14 January 2019\| \|0}} {{#explode:14 January 2019\| \|1}}]] [[{{#explode:14 January 2019\| \|2}}]] (update)	Hotfix The Alchemical Hydra gained access to Konar's drop table.^[5]

Trivia

Despite being visible in the overworld, the Alchemical Hydra is fought in an instance.
The Alchemical Hydra has the highest Slayer requirement of all the slayer bosses, overtaking the thermonuclear smoke devil.

References

^ Jagex. Mod Ash's Twitter account. 13 January 2019. Archived from the original on 16 April 2019. Mod Ash: "The first roll will go to the unique table OR to the standard table. The second roll will always go to the standard table. And you only get one pet roll in either situation."
^ Jagex. Mod Ash's Twitter account. 7 August 2023. Archived from the original on 10 August 2023. Mod Ash: "I believe those are 180 mins. This is not universal across all instances, but it's been enabled for quite a few repeatable boss rooms."
^ Whether a unique item is dropped is determined by the game rolling each item in succession, and if it fails, the next item is rolled. If any item is successfully rolled, it will be dropped, and if no item is rolled, it is replaced by a regular drop. The order is dragon thrownaxe, dragon knife, hydra's claw, hydra tail, hydra leather and brimstone ring piece. For example, a brimstone ring piece rate follows the formula ${\frac {1}{180\div ({\frac {1999}{2000}}\times {\frac {1999}{2000}}\times {\frac {999}{1000}}\times {\frac {511}{512}}\times {\frac {511}{512}})}}={\frac {1}{181.07}}$
Jagex. Mod Munro's Twitter account. 14 February 2019. Archived from the original on 16 April 2019. Mod Munro: "Yes, your edit to the wiki is correct."
^ ^4.00 ^4.01 ^4.02 ^4.03 ^4.04 ^4.05 ^4.06 ^4.07 ^4.08 ^4.09 ^4.10 ^4.11 ^4.12 Jagex. Mod Munro's Twitter account. 13 February 2019. Archived from the original on 25 March 2019. Mod Munro: "As I mentioned on the Q & A, here are the pictures of the drop rates for various parts of Kebos. This time with the correct drop rate for the pieces of the Brimstone Ring."
^ Jagex. Old School RuneScape's Twitter account. 14 January 2019. Archived from the original on 25 May 2020. Old School RuneScape: "3. The Alchemical Hydra now accesses Konar's drop table."

[brimstone_ring-4] 1.0 ^1.1 ^1.2 The order in which players receive the items is: Hydra's eye, Hydra's fang and finally Hydra's heart.

[dual-drop-6] 1.0 ^1.1 Players will receive Mystic fire staff together with Mystic water staff

[dual-drop-rune-7] 2.0 ^2.1 ^2.2 Players will receive Rune platebody together with Rune platelegs or Rune plateskirt

[dual-drop-mystic-8] 3.0 ^3.1 Players will receive Mystic robe top (light) together with Mystic robe bottom (light)

[dual-drop-pots-9] 1.0 ^1.1 Players will receive Ranging potion(3) together with two Super restore(3)

[10] The "nothing" drop is removed while wearing a ring of wealth.

[row-11] 2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.

[12] The hard clue scroll drop rate increases to 1/95 after unlocking the hard Combat Achievements rewards tier.

[13] The elite clue scroll drop rate increases to 1/243 after unlocking the elite Combat Achievements rewards tier.

[1] Jagex. Mod Ash's Twitter account. 13 January 2019. Archived from the original on 16 April 2019. Mod Ash: "The first roll will go to the unique table OR to the standard table. The second roll will always go to the standard table. And you only get one pet roll in either situation."

[2] Jagex. Mod Ash's Twitter account. 7 August 2023. Archived from the original on 10 August 2023. Mod Ash: "I believe those are 180 mins. This is not universal across all instances, but it's been enabled for quite a few repeatable boss rooms."

[3] Whether a unique item is dropped is determined by the game rolling each item in succession, and if it fails, the next item is rolled. If any item is successfully rolled, it will be dropped, and if no item is rolled, it is replaced by a regular drop. The order is dragon thrownaxe, dragon knife, hydra's claw, hydra tail, hydra leather and brimstone ring piece. For example, a brimstone ring piece rate follows the formula ${\frac {1}{180\div ({\frac {1999}{2000}}\times {\frac {1999}{2000}}\times {\frac {999}{1000}}\times {\frac {511}{512}}\times {\frac {511}{512}})}}={\frac {1}{181.07}}$
Jagex. Mod Munro's Twitter account. 14 February 2019. Archived from the original on 16 April 2019. Mod Munro: "Yes, your edit to the wiki is correct."

[Alchemical_Hydra-5] 4.00 ^4.01 ^4.02 ^4.03 ^4.04 ^4.05 ^4.06 ^4.07 ^4.08 ^4.09 ^4.10 ^4.11 ^4.12 Jagex. Mod Munro's Twitter account. 13 February 2019. Archived from the original on 25 March 2019. Mod Munro: "As I mentioned on the Q & A, here are the pictures of the drop rates for various parts of Kebos. This time with the correct drop rate for the pieces of the Brimstone Ring."

[14] Jagex. Old School RuneScape's Twitter account. 14 January 2019. Archived from the original on 25 May 2020. Old School RuneScape: "3. The Alchemical Hydra now accesses Konar's drop table."

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v • t • e Alchemical Hydra
NPCs	Orrvor quo Maten Alchemical Hydra
Unique drops	Hydra's eye Hydra's fang Hydra's heart Hydra's claw Hydra tail Hydra leather Alchemical hydra heads Jar of chemicals Ikkle hydra
Equipment	Brimstone ring Dragon hunter lance Bonecrusher necklace Ferocious gloves
Other	Karuulm Slayer Dungeon Alchemical Attack!

Alchemical Hydra

Contents

Location

Fight overview

Money making

Drops