Toph, the First Metalbender, Biotransference, and Carrion Feeder

Prerequisites

• Toph, the First Metalbender on the battlefield
• Biotransference on the battlefield
• Carrion Feeder on the battlefield
• plus the cost of the creature that earthbends available

Steps

1. Cast the earthbending creature by paying its mana cost
2. When you cast that spell, you lose 1 life and create a 2/2 artifact creature token
3. The earthbending creature enters as an artifact land creature due to Biotransference and Toph
4. When that creature enters, it earthbends, causing itself to become a land creature with haste, putting at least one +1/+1 counter on itself, and creating a delayed triggered ability
5. Activate Carrion Feeder by sacrificing that creature
6. When that creature dies, the delayed ability from step 4 triggers, causing it to return to the battlefield tapped as an artifact land creature
7. Repeat from step 3 any number of times
8. Resolve all activated abilities from Carrion Feeder

Results

• Infinite +1/+1 counters on a creature
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite landfall triggers
• Infinite sacrifice triggers