Vilemaw (League of Legends)

Vilemaw is the most powerful neutral monster on Twisted Treeline in League of Legends. Once defeated, Vilemaw will grant all living members of the killing team a buff that provides health and mana regen as well as an attack speed buff and 20% CDR.

Vilemaw has a powerful AoE conical pull attack and a stacking debuff that reduces your armor and magic resistance by 0.5 (estimate). The dubuff caps at 30 stacks. Being hit by its melee basic attacks will apply one stack, while his long ranged attacks apply 4 stacks and his short ranged AoE slam attacks will apply 15 stacks.

Trivia
The bones of the previous master of the old Twisted Treeline can be seen inside Vilemaws lair.

Dancing next to Vilemaw will cause him to do the Carlton Dance, but it has yet to be confirmed if this applies to all champions or only to those who are alleged with the Shadow Isles.