Shelldock Bosk
Land (Rare)

Shelldock Bosk enters the battlefield tapped unless you sacrifice a Shapeshifter.

Tap: Add UB to your mana pool. Return Shelldock Bosk to its owner's hand.

BB, Tap, Sacrifice Shelldock Bosk: Target creature gets -2/-2 until end of turn.

Kev Avon