Copperline Heath
Land-Forest Plains (Rare)

(Tap: Add G or W to your mana pool.)

Copperline Heath enters the battlefield tapped unless you control five or more planeswalkers.

2, Tap: Target land becomes a 3/3 green Elf creature until end of turn. It's still a land.

W, Tap, Sacrifice Copperline Heath: Prevent all combat damage that would be dealt this turn.

Steve Palck