Athreos, Shroud-Veiled, Skullbriar, the Walking Grave, and Ashnod's Altar

Prerequisites

• Athreos, Shroud-Veiled on the battlefield
• Skullbriar, the Walking Grave on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Move to your end step
2. Athreos triggers, placing a coin counter on Skullbriar
3. Sacrifice Skullbriar to Ashnod's Altar to add
4. Athreos triggers, returning Skullbriar to the battlefield
5. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers