Head

Head is fought on a boat ride during the Temple Trekking minigame. It is located in a multi-combat zone with four other Tentacles(level-99). They attack only with melee, so Protect from Melee is dandy.

Decapitation! (Strategy)
The Head can only be defeated when the level 99 Tentacles are killed. Turn on Protect from Melee and kill the tentacle closest to your escortee. Once it's dead, you friend should be a little safer. Kill the other tentacles in order from the distance from your escortee, closest to farthest. Poisoning a Tentacle is a good idea, as the posion damages all four Tentacles and the Head.

Once the Tentacles are dead, the head shouldn't be much of a problem. Just keep it away from your escortee and unleash everything you've got on it. It's easy as that.

Habitat(s)
Temple Trekking

Other drops
Nothing