Grass-of Whispers
Land-Swamp Forest (Rare)

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

Grass-of Whispers enters the battlefield tapped unless you pay G.

GG, Tap, Sacrifice Grass-of Whispers: Destroy target enchantment.

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

Eric Nielsen