Blackcleave Farm
Land-Swamp Forest (Rare)

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

At the beginning of your end step, if you didn't cast any spells this turn, Blackcleave Farm deals 1 damage to you.

2G: Blackcleave Farm becomes a 2/2 black and green Cleric creature with trample until end of turn. It's still a land.

Lars Deschamps