Defiler of Faith is a rare Creature — Phyrexian Human card from Dominaria United (DMU), collector number 385. Current market price: $1.03 (foil $0.84), TCGplayer market prices via Scryfall.
Vigilance As an additional cost to cast white permanent spells, you may pay 2 life. Those spells cost {W} less to cast if you paid life this way. This effect reduces only the amount of white mana you pay. Whenever you cast a white permanent spell, create a 1/1 white Soldier creature token.