Scouring Swarm, Beifong's Bounty Hunters, and Phantom Train

Prerequisites

• Scouring Swarm on the battlefield
• Beifong's Bounty Hunters 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 a land you control
3. Resolve the Phantom Train ability
4. Activate Phantom Train by sacrificing the earthbent land
5. When the land dies, it and Scouring Swarm trigger
6. Resolve the land's trigger, returning it from your graveyard to the battlefield tapped
7. Resolve the Scouring Swarm trigger, untapping it and creating a creature token
8. Resolve the Phantom Train ability
9. Repeat

Results

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