Master of Pearls is a rare Creature — Human Monk card from Murders at Karlov Manor Commander (MKC), collector number 73. Current market price: $0.18, TCGplayer market prices via Scryfall.
Morph {3}{W}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, creatures you control get +2/+2 until end of turn.