Islandwalk

Islandfall - Whenever an Island enters the battlefield under your control, Wartortle gets +1/+1 until end of turn.

Skull Bash - {2}{u}: Wartortle deals damage equal to its power to any target.

Evolves into Blastoise {1}{U}{U} (If you pay the evolves into cost, sacrifice this creature, then you may put a card named in the cost onto the battlefield without paying its mana cost)