Poliwhirl

Islandwalk
Forestwalk

Poliwhirl can’t evolve unless you control two or more basic land types.

When Poliwhirl is dealt damage, search your library for a basic forest card and place it onto the battlefield. Shuffle your library. Tap Poliwhirl. It doesn’t untap until your next upkeep.

Evolve - Sacrifice an artifact named Water Stone. Transform Poliwhirl.