Beifong's Bounty Hunters, Dwarven Mine, Umbral Collar Zealot, and Horizon Explorer

Prerequisites

• Beifong's Bounty Hunters on the battlefield
• Dwarven Mine on the battlefield
• Umbral Collar Zealot on the battlefield
• Horizon Explorer on the battlefield

Steps

1. Activate Umbral Collar Zealot by sacrificing another nonland creature you control
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending Dwarven Mine
3. Resolve the Umbral Collar Zealot ability, causing you to surveil 1 Activate Umbral Collar Zealot by sacrificing Dwarven Mine
4. When Dwarven Mine dies, Beifong's Bounty Hunters triggers, returning Dwarven Mine from your graveyard to the battlefield untapped due to Horizon Explorer When Dwarven Mine enters, it triggers, creating a 1/1 Dwarf creature token
5. Resolve the Umbral Collar Zealot ability, causing you to surveil 1 Repeat

Results

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