Megalodon

Islandwalk
Feeding Frenzy — When Megalodon enters the battlefield, destroy up to three target creatures
with toughness 3 or less. Put a -1/-1 counter on Megalodon for each creature destroyed in this
way. If three creatures were destroyed in this
way, Megalodon gains haste until end of turn.
Whenever Megalodon attacks, remove a -1/-1
counter from it.