Havik, Cultivator of Chaos

Havik, Cultivator of Chaos enters the battlefield with X mutilate counters where X is how much mana was spent to cast it.
Attacking creatures you control get +0/+X until end of the turn where X is the number of mutilate counters on this card.
Blocking creatures you control get +X/+0 until end of the turn where X is the number of mutilate counters on this card.