Shepherd of the Cosmos, Kaya's Ghostform, and Woe Strider

Prerequisites

• Shepherd of the Cosmos on the battlefield
• Kaya's Ghostform on the battlefield
• Woe Strider on the battlefield

Steps

1. Activate Woe Strider 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 Woe Strider ability, causing you to scry 1
5. Repeat

Results

• Infinite creature LTB
• Infinite creature ETB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite scry 1