Birgi, God of Storytelling // Harnfel, Horn of Bounty, Seething Song, and Reiterate

Prerequisites

• Birgi, God of Storytelling // Harnfel, Horn of Bounty on the battlefield
• Seething Song in hand
• Reiterate in hand
• available

Steps

1. Cast Seething Song by paying
2. Birgi triggers, adding
3. Holding priority, cast Reiterate with buyback by paying , targeting Seething Song
4. Birgi triggers, adding
5. Resolve Reiterate, copying Seething Song and returning Reiterate to your hand
6. Resolve the copy of Seething Song, adding
7. Repeat from step 3

Results

• Infinite magecraft triggers
• Infinite storm count