Agatha of the Vile Cauldron, and Spawnsire of Ulamog

Prerequisites

• Agatha of the Vile Cauldron on the battlefield
• Spawnsire of Ulamog on the battlefield
• Agatha of the Vile Cauldron has power 3 or greater
• available

Steps

1. Activate Spawnsire of Ulamog's first ability by paying , creating two 0/1 Eldrazi Spawn creature tokens
2. Activate an Eldrazi Spawn by sacrificing it, adding
3. Repeat

Results

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