Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Extruder, and Pentavus

Prerequisites

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

Steps

1. Activate Extruder by sacrificing Pentavus
2. When Pentavus dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect
3. Resolve the Extruder ability
4. Repeat

Results

• Infinite +1/+1 counters on creatures you control
• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers
• Infinite creature sacrifice triggers
• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers