Beifong's Bounty Hunters, Dwarven Mine, Phyrexian Altar, and Spelunking

Prerequisites

• Beifong's Bounty Hunters on the battlefield
• Dwarven Mine on the battlefield
• Phyrexian Altar on the battlefield
• Spelunking on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing another nonland creature you control
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending Dwarven Mine
3. Activate Phyrexian 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 Spelunking When Dwarven Mine enters, it triggers, creating a 1/1 Dwarf creature token
5. Repeat

Results

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