The Underworld Cookbook + Clock of Omens + Metalwork Colossus + Stridehangar Automaton

Prerequisites

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Steps

1. 1Activate The Underworld Cookbook's first ability by tapping it and discarding Metalwork Colossus, creating a 1/1 Thopter artifact creature token and a Food token.
2. 2Activate Clock of Omens by tapping the Food and Thopter, untapping The Underworld Cookbook.
3. 3Activate Metalwork Colossus by sacrificing the Food and Thopter, returning it from your graveyard to your hand.
4. 4Repeat.

Effects

• Infinite self-discard triggers