Ancient Hydra

Ancient Hydra enters the battlefield with X
+1/+1 counters.
Aberration (When combat damage is being assigned to this creature, instead put that many -1/-1 counter on it for each point of damage being dealt, then put that many Intestine tokens with 0/1, Shroud and Defender.)
Sacrifice X Intestine tokens: Destroy target creature with a mana cost of X or less.