Defiler of Instinct
Creature — Phyrexian Kavu
First strike
As an additional cost to cast red 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 red mana you pay.
Whenever you cast a red permanent spell, this creature deals 1 damage to any target.
Steven Belledin
Dominaria United (DMU)
• #119Rulings
You may only pay the additional cost once per permanent spell.
(wotc • 2022-09-09)
Some players may make the mental shortcut that the Defilers effectively turn one of the colored mana symbols in the spell’s cost into a Phyrexian colored mana symbol. Despite the similarity in function, this ability does not cause the spells to have Phyrexian mana symbols in their costs. Sorry, Rage Extractor!
(wotc • 2022-09-09)
Rulings
You may only pay the additional cost once per permanent spell.
(wotc • 2022-09-09)
Some players may make the mental shortcut that the Defilers effectively turn one of the colored mana symbols in the spell’s cost into a Phyrexian colored mana symbol. Despite the similarity in function, this ability does not cause the spells to have Phyrexian mana symbols in their costs. Sorry, Rage Extractor!
(wotc • 2022-09-09)