Defiler of Vigor is a rare Creature — Phyrexian Wurm card from Dominaria United (DMU), collector number 412. Current market price: $4.64 (foil $4.67), TCGplayer market prices via Scryfall.
Trample As an additional cost to cast green permanent spells, you may pay 2 life. Those spells cost {G} less to cast if you paid life this way. This effect reduces only the amount of green mana you pay. Whenever you cast a green permanent spell, put a +1/+1 counter on each creature you control.