Prismari, the Inspiration + Insidious Will

Prerequisites

• You have another instant or sorcery card in hand with the mana to cast it and applicable target(s) if needed.

Steps

1. 1Cast any other instant or sorcery by paying its mana cost.
2. 2Holding priority, cast Insidious Will by paying its mana cost, targeting the instant or sorcery cast in step 1.
3. 3Insidious Will's storm ability triggers, creating at least one copy of Insidious Will targeting the original Insidious Will.
4. 4Resolve a copy of Insidious Will, copying Insidious Will targeting the original Insidious Will.
5. 5Repeat step 4.

Effects

• Infinite magecraft triggers