Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Extruder, and Arcbound Condor

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Extruder on the battlefield
• Arcbound Condor on the battlefield

Steps

1. Activate Extruder by sacrificing Arcbound Condor
2. When Arcbound Condor dies, its modular ability and persist ability trigger
3. Resolve the modular trigger, putting Arcbound Condor's +1/+1 counters on another artifact creature
4. Resolve the persist trigger, returning Arcbound Condor from your graveyard to the battlefield
5. It will not have a -1/-1 counter on it due to its modular ability
6. Resolve the Extruder ability
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters