Spawnsire of Ulamog, and Pitiless Plunderer

Prerequisites

• Spawnsire of Ulamog on the battlefield
• Pitiless Plunderer on the battlefield
• available

Steps

1. Activate Spawnsire of Ulamog's first ability by paying , creating two 0/1 Eldrazi Spawn creature tokens
2. Activate the Eldrazi Spawns by sacrificing them, adding
3. When the Eldrazi Spawns die, Pitiless Plunderer triggers twice, creating two Treasure artifact tokens
4. Activate the Treasures by tapping and sacrificing them, adding
5. Repeat

Results

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