Vannifar, Evolved Enigma — Murders at Karlov Manor Promos #241p

At the beginning of combat on your turn, choose one —

• Cloak a card from your hand. (Put it onto the battlefield face down as a 2/2 creature with ward . Turn it face up any time for its mana cost if it's a creature card.)

• Put a +1/+1 counter on each colorless creature you control.