Spawnsire of Ulamog, and Zirda, the Dawnwaker

Prerequisites

• Spawnsire of Ulamog on the battlefield
• Zirda, the Dawnwaker on the battlefield
• available

Steps

1. Activate Spawnsire of Ulamog by paying , creating two 0/1 Eldrazi Spawn creature tokens
2. Activate both Eldrazi Spawn tokens by sacrificing them, adding
3. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers