Beifong's Bounty Hunters, Dwarven Mine, Ashnod's Altar, and Horizon Explorer

Prerequisites

• Beifong's Bounty Hunters on the battlefield
• Dwarven Mine on the battlefield
• Ashnod's Altar on the battlefield
• Horizon Explorer on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing another nonland creature you control
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending Dwarven Mine
3. Activate Ashnod's Altar by sacrificing Dwarven Mine
4. When Dwarven Mine dies, Beifong's Bounty Hunters triggers, returning it 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. Repeat

Results

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers