Dragonskull Coliseum
Land (Rare)

Dragonskull Coliseum enters the battlefield tapped.

Tap: Add U or B to your mana pool. Dragonskull Coliseum deals 1 damage to you.

3: Dragonskull Coliseum becomes a 2/2 blue Cephalid creature until end of turn. It's still a land.

Steve Grant West