Gobul

Disguise {u/b}{u/b} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up
any time for its disguise cost.)
When Gobul is turned face up, you may Inflict
target creature with Paralysis.
{u}, Sacrifice a creature: Cloak Gobul. It gains
hexproof until end of turn.