Grenzo, Dungeon Warden, Kiki-Jiki, Mirror Breaker, Swiftgear Drake, and Ashnod's Altar

Prerequisites

• Grenzo, Dungeon Warden on the battlefield
• Kiki-Jiki, Mirror Breaker on the battlefield
• Swiftgear Drake on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Kiki-Jiki by tapping it, targeting Swiftgear Drake
2. Holding priority, activate Ashnod's Altar by sacrificing Kiki-Jiki, adding
3. Resolve the Kiki-Jiki ability, creating a token copy of Swiftgear Drake
4. When the Swiftgear Drake token enters the batlefield, it triggers, putting Kiki-Jiki on the bottom of your library from your graveyard
5. Activate Grenzo by paying , putting Kiki-Jiki into your graveyard from the bottom of your library, and then putting it onto the battlefield
6. Repeat

Results

• Infinite colorless mana
• Infinite creature tokens with haste
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite self-mill