Complete the Circuit [March of the Machine] EX2-011 Return half the creatures they

Return half the creatures they control to their owner's hand

and Y is half the number of Forests you control

oracle of Purphoros

they get that many poison counters

Complete the Circuit [March of the Machine] EX2-011 Return half the creatures theySet: March of the Machine Type: Instant Rarity: Rare Cost: {5}{U} Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) You may cast sorcery spells this turn as though they had flash. When you next cast an instant or sorcery spell this turn, copy that spell twice. You may choose new targets for the copies.