It is highly recommended to activate the Protect from Melee prayer before speaking to him, as after accepting his challenge, he can immediately hit the player for up to 57 damage. During the fight, Kob can hit through Protect from Melee, but will deal far less damage if it is active.
Players can safespot Kob by running out to the door and using ranged, magic, or a halberd, as he will not be able to reach them. When he is defeated, Kob will beg for mercy and agree to not help the monkeys.
Naming convention
Trolls are named after the first thing they eat. In this case, Kob's name comes from a cob, a term used in the English Midlands to refer to a crusty bread roll.[1]
^Jagex. Mod Ash's Twitter account. 28 January 2022. Archived from the original on 19 May 2023. Mod Ash: "A cob is a small bread roll. (Trolls don't always preserve the spelling.)"