Defiler of Vigor is a rare Creature — Phyrexian Wurm card from Magic Online Promos (PRM), collector number 103464.
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.