Rootha, Mercurial Artist + Expansion // Explosion

Prerequisites

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Steps

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

Effects

• Infinite magecraft triggers