Ovalchase Daredevil, Kheru Goldkeeper, and Birgi, God of Storytelling // Harnfel, Horn of Bounty

Prerequisites

• Ovalchase Daredevil in the graveyard
• Kheru Goldkeeper on the battlefield
• Birgi, God of Storytelling // Harnfel, Horn of Bounty on the battlefield

Steps

1. Cause an artifact to enter the battlefield under your control
2. Ovalchase Daredevil triggers, returning it from your graveyard to your hand
3. Kheru Goldkeeper triggers
4. Holding priority, activate Harnfel by discarding Ovalchase Daredevil
5. Resolve the Kheru Goldkeeper trigger, creating a Treasure token
6. Repeat from step 2

Results

• Infinite colored mana
• Infinite self-discard triggers
• Infinite Treasure tokens
• Exile your library with the ability to play the exiled cards until end of turn