Obsidian Ruins
Land-Swamp Forest (Rare)

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

When Obsidian Ruins enters the battlefield, you lose 2 life unless you reveal an enchantment card from your hand.

2: Obsidian Ruins becomes a 2/2 black Rogue creature until end of turn. It's still a land.

Jesper Moeller