Defiler of Vigor [Dominaria United Prerelease Promos]

Set: Dominaria United Prerelease Promos Type: Creature — Phyrexian Wurm Rarity: Rare Cost: {3}{G}{G} TrampleAs 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.