Shepherd of the Cosmos, Shilgengar, Sire of Famine, and Kaya's Ghostform

Prerequisites

• Shepherd of the Cosmos on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• Kaya's Ghostform on the battlefield
• undefined

Steps

1. Activate Shilgengar by sacrificing Shepherd of the Cosmos
2. When Shepherd of the Cosmos dies, Kaya's Ghostform triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield
3. When Shepherd of the Cosmos enters the battlefield, it triggers, returning Kaya's Ghostform from your graveyard to the battlefield attached to Shepherd of the Cosmos
4. Resolve the Shilgengar ability
5. Repeat

Results

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