Rootha, Mercurial Artist + Refuse // Cooperate

Rootha, Mercurial Artist

Refuse // Cooperate

How it works

1. Cast an instant or sorcery spell, or wait for an opponent to cast one.
2. Holding priority, cast Cooperate from your graveyard by paying 2, targeting the spell.
3. Activate Rootha by paying 2 and returning it to your hand, copying Cooperate, with the copy targeting the original Cooperate.
4. Resolve the copy of Cooperate, copying Cooperate, targeting the original Cooperate.
5. Repeat step 4.

This loop brilliantly exploits Rootha, Mercurial Artist's ability to bounce herself and copy a spell, turning Cooperate—the aftermath half of Refuse // Cooperate cast from your graveyard—into an endless recursion engine. By targeting the original Cooperate with its own copies, you can repeat the process indefinitely as long as you have the mana to keep activating Rootha. Because Rootha returns to your hand as a cost, you can simply replay her and restart the sequence whenever you need to fuel infinite magecraft triggers.