Defiler of Vigor
From Dominaria United set
Defiler of Vigor
Creature — Phyrexian Wurm
6/6
Trample
As an additional cost to cast green 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 green mana you pay.
Whenever you cast a green permanent spell, put a +1/+1 counter on each creature you control.