Agatha of the Vile Cauldron, Phyrexian Altar, and Thundering Spineback

Prerequisites

• Agatha of the Vile Cauldron on the battlefield
• Phyrexian Altar on the battlefield
• Thundering Spineback on the battlefield
• Agatha of the Vile Cauldron has power 5 or greater
• available

Steps

1. Activate Thundering Spineback by paying due to Agatha of the Vile Cauldron, creating a 3/3 Dinosaur creature token
2. Activate Phyrexian Altar by sacrificing the Dinosaur, adding
3. Repeat

Results

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