Colossal Hydra

Trample, haste, protection from spells and planeswalker abilities, X strike
(X is the amount of +1/+1 counters it has)
Colossal Hydra enters the battlefield with X
+1/+1 counters on it. When Colossal Hydra
attacks, double the +1/+1 counters Colossal
Hydra has and create an exact copy of Colossal
Hydra. If damage is dealt to Colossal Hydra put
X +1/+1 counters on it(X is the amount of
damage dealt).