Haru, Hidden Talent, Bloodghast, Xenograft, and Yahenni, Undying Partisan

Prerequisites

• Haru, Hidden Talent on the battlefield
• Bloodghast in hand
• Xenograft on the battlefield
• Yahenni, Undying Partisan on the battlefield
• available

Steps

1. Cast Bloodghast by paying
2. When Bloodghast enters as an Ally due to Xenograft, Haru triggers, earthbending a land
3. Activate Yahenni by sacrificing Bloodghast
4. Activate Yahenni by sacrificing a land creature
5. When the land creature dies, Haru triggers, returning the land from your graveyard to the battlefield
6. When the land enters, Bloodghast triggers, returning itself from your graveyard to the battlefield
7. When Bloodghast enters as an Ally due to Xenograft, Haru triggers, earthbending a land
8. Resolve the Yahenni ability from step 4
9. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers
• Infinite mana lands you control that enter the battlefield untapped can produce