Rootha, Mercurial Artist + Twincast

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 Twincast by paying , targeting the spell.
3. 3Activate Rootha by paying and returning it to your hand, copying Twincast, with the copy targeting the original Twincast.
4. 4Resolve the copy of Twincast, copying Twincast, targeting the original Twincast.
5. 5Repeat step 4.

Effects

• Infinite magecraft triggers