Defiler of Faith (PPDMU-016) - Dominaria United Promos (Promo Pack)

Vigilance
As an additional cost to cast white permanent spells, you may pay 2 life. Those spells cost 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.