Bad Canopy
Land-Swamp Forest (Rare)

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

Bad Canopy enters the battlefield tapped unless you sacrifice an artifact creature.

BB, Tap, Sacrifice Bad Canopy: Put a -1/-1 counter on target creature.

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

Allan Argyle