Porcelain Zealot is a uncommon Creature — Phyrexian Soldier card from Phyrexia: All Will Be One (ONE), collector number 30. Current market price: $0.23 (foil $0.09), TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, target creature you control gets +1/+1 until end of turn. If that creature has toxic, instead it gets +2/+2 until end of turn.