Lava-Eater Hydra

Haste
Lava-Eater Hydra enters the battlefield with X
+1/+1 counters.
Sacrifice a mountain : Lava-Eater Hydra gets
+2/+2 and trample until end of turn. If that
mountain was untapped, Lava-Eater Hydra
deals 3 damage to any target and get's a +1/+1
counter.