Beifong's Bounty Hunters, Dwarven Mine, Spelunking, and Phantom Train

Prerequisites

• Beifong's Bounty Hunters on the battlefield
• Dwarven Mine on the battlefield
• Spelunking on the battlefield
• Phantom Train on the battlefield

Steps

1. Activate Phantom Train by sacrificing another nonland creature you control
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending Dwarven Mine
3. Resolve the Phantom Train ability, putting a +1/+1 counter on Phantom Train and causing it to become a creature until end of turn Activate Phantom Train 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 Spelunking When Dwarven Mine enters, it triggers, creating a 1/1 Dwarf creature token
5. Resolve the Phantom Train ability, putting a +1/+1 counter on Phantom Train and causing it to become a creature until end of turn Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers