Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Shilgengar, Sire of Famine, and Clockwork Hydra

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• Clockwork Hydra on the battlefield

Steps

1. Activate Shilgengar by sacrificing Clockwork Hydra
2. When Clockwork Hydra 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 Shilgengar ability
4. Repeat

Results

• Infinite Blood tokens
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers