Narset's Reversal, and Insidious Will

Prerequisites

• Narset's Reversal in hand
• Insidious Will in hand
• plus enough mana to cast the additional instant or sorcery available

Steps

1. Cast any instant or sorcery by paying its mana cost
2. Holding priority, cast Insidious Will by paying its mana cost, targeting the instant or sorcery cast in step 1
3. Cast Narset's Reversal by paying , copying Insidious Will targeting the spell cast in step 1 and returning the original Insidious Will to your hand
4. Cast Insidious Will by paying its mana cost, copying the copy of Insidious Will, targeting the copy of Insidious Will
5. Resolve the copy of Insidious Will, creating a copy of Insidious Will targeting the copy of Insidious Will
6. Repeat step 5

Results

• Infinite magecraft triggers