Toph, the First Metalbender, Haru, Hidden Talent, Bloodline Pretender, and Yahenni, Undying Partisan

Prerequisites

• Toph, the First Metalbender on the battlefield
• Haru, Hidden Talent on the battlefield
• Bloodline Pretender in hand
• Yahenni, Undying Partisan on the battlefield
• available

Steps

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

Results

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