Vannifar, Evolved Enigma (Showcase) (0373) (MKM-373) - Murders at Karlov Manor: (Showcase)

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 {2}. 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.