Plains Karst
Land-Forest Plains (Rare)

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

At the beginning of your upkeep, Plains Karst deals 2 damage to target creature you control.

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

2G, Tap: Target green creature gets +2/+2 until end of turn.

Steve Chan