The Underworld Cookbook, Clock of Omens, Metalwork Colossus, and Kaya, Geist Hunter

Prerequisites

• The Underworld Cookbook on the battlefield
• Clock of Omens on the battlefield
• Metalwork Colossus in hand
• Kaya, Geist Hunter on the battlefield
• Kaya has at least two loyalty counters on it

Steps

1. Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn
2. Activate The Underworld Cookbook's first ability by tapping it and discarding Metalwork Colossus, creating two Food tokens
3. Activate Clock of Omens by tapping the Foods, untapping The Underworld Cookbook
4. Activate Metalwork Colossus by sacrificing the Foods, returning it from your graveyard to your hand
5. Repeat from step 2

Results

• Infinite self-discard triggers