Toph, the First Metalbender, Haru, Hidden Talent, Yahenni, Undying Partisan, and Three Tree Mascot

Prerequisites

• Toph, the First Metalbender on the battlefield
• Haru, Hidden Talent on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Three Tree Mascot in hand
• available

Steps

1. Cast Three Tree Mascot by paying
2. When Three Tree Mascot enters, Haru triggers, targeting Three Tree Mascot as it is a land due to Toph
3. Activate Yahenni by sacrificing Three Tree Mascot
4. When Three Tree Mascot dies, Haru triggers, returning Three Tree Mascot from your graveyard to the battlefield tapped
5. When Three Tree Mascot enters, Haru triggers, targeting Three Tree Mascot as it is a land due to Toph
6. Resolve the Yahenni ability
7. Repeat from step 3

Results

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