Prismari, the Inspiration, and Flare of Duplication

Prerequisites

• Prismari, the Inspiration on the battlefield
• Flare of Duplication in hand
• at most available

Steps

1. Cast any other 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. Flare of Duplication's storm ability triggers, creating at least one copy of Flare of Duplication targeting the original Flare of Duplication
4. Resolve a copy of Flare of Duplication, copying Flare of Duplication targeting the original Flare of Duplication
5. Repeat step 4

Results

• Infinite magecraft triggers