Karona's Zealot is a uncommon Creature — Human Cleric card from Masters 25 (A25), collector number 18. Current market price: $0.02 (foil $0.50), 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, all damage that would be dealt to it this turn is dealt to target creature instead.