Rot Cradle
Land (Rare)

Rot Cradle enters the battlefield tapped unless you control one or more Skeletons.

Tap: Add BG to your mana pool. Rot Cradle doesn't untap during your next untap step.

BG: Rot Cradle becomes a 2/1 black and green Wizard creature until end of turn. It's still a land.

Ron Myrfors