Beifong's Bounty Hunters, Grimgrin, Corpse-Born, and Shuttlecraft Galileo

Prerequisites

• Beifong's Bounty Hunters on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Shuttlecraft Galileo on the battlefield

Steps

1. Activate Grimgrin by sacrificing another nonland creature you control When the creature dies, Beifong's Bounty Hunters triggers, earthbending a land
2. Resolve the Grimgrin ability, untapping it and putting a +1/+1 counter on it
3. Activate Grimgrin by sacrificing the land When the land dies, Beifong's Bounty Hunters triggers, returning the land from your graveyard to the battlefield tapped
4. When the land enters, Shuttlecraft Galileo triggers, creating a 1/1 red Officer creature token Resolve the Grimgrin ability, untapping it and putting a +1/+1 counter on it
5. 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