Beifong's Bounty Hunters, Yahenni, Undying Partisan, and Bridge from Below

Prerequisites

• Beifong's Bounty Hunters on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Bridge from Below in the graveyard

Steps

1. Activate Yahenni by sacrificing another nonland creature
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending a land you control
3. Resolve the Yahenni ability
4. Activate Yahenni by sacrificing the earthbent land
5. When the land dies, Bridge from Below and Beifong's Bounty Hunters trigger
6. Resolve the Beifong's Bounty Hunters trigger, returning the land from your graveyard to the battlefield
7. Resolve the Bridge from Below trigger, creating a creature token
8. Resolve the Yahenni ability
9. Repeat

Results

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