Zopandrel, Hunger Dominus [Phyrexia: All Will Be One] DYN005 Choose an action card with

Choose an action card with {d} less than or equal to X then add it to this chain link as a defending card

or Vehicle card

instead deals that much arcane damage plus X

You're trying to cast a spell

Zopandrel, Hunger Dominus [Phyrexia: All Will Be One] DYN005 Choose an action card withSet: Phyrexia: All Will Be One Type: Legendary Creature Phyrexian Horror Rarity: Mythic Cost: {5}{G}{G} Reach At the beginning of each combat, double the power and toughness of each creature you control until end of turn. {G P}{G P}, Sacrifice two other creatures: Put an indestructible counter on Sopandrel, Hunger Dominus. ({G P} can be paid with either {G} or 2 life.)