The Underworld Cookbook
Clock of Omens
Metalwork Colossus
Stridehangar Automaton

   Prerequisites

What do I need to start this combo?
Metalwork Colossus in hand.
All other permanents on the battlefield.

   Steps

How does this combo work?
1
Activate 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
Activate Clock of Omens by tapping the Food and Thopter, untapping The Underworld Cookbook.
3
Activate Metalwork Colossus by sacrificing the Food and Thopter, returning it from your graveyard to your hand.
4
Repeat.

   Results

What do I get from this combo?
Infinite self-discard triggers
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