Narset's Reversal, and Flare of Duplication

Prerequisites

• Narset's Reversal in hand
• Flare of Duplication in hand
• plus enough mana to cast the additional instant or sorcery at most available

Steps

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

Results

• Infinite magecraft triggers