Toph, the First Metalbender, Haru, Hidden Talent, Phyrexian Altar, and Barkform Harvester

Prerequisites

• Toph, the First Metalbender on the battlefield
• Haru, Hidden Talent on the battlefield
• Phyrexian Altar on the battlefield
• Barkform Harvester in hand
• available

Steps

1. Cast Barkform Harvester by paying
2. When Barkform Harvester enters, Haru triggers, targeting Barkform Harvester as it is a land due to Toph
3. Activate Phyrexian Altar by sacrificing Barkform Harvester
4. When Barkform Harvester dies, Haru triggers, returning Barkform Harvester from your graveyard to the battlefield tapped
5. When Barkform Harvester enters, Haru triggers, targeting Barkform Harvester as it is a land due to Toph
6. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers