Alharu, Solemn Ritualist, Beifong's Bounty Hunters, and Grimgrin, Corpse-Born

Prerequisites

• Alharu, Solemn Ritualist on the battlefield
• Beifong's Bounty Hunters on the battlefield
• Grimgrin, Corpse-Born on the battlefield

Steps

1. Activate Grimgrin 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 Grimgrin ability, putting a +1/+1 counter on Grimgrin and untapping it Activate Grimgrin by sacrificing the earthbent land
4. When the land dies, Beifong's Bounty Hunters and Alharu trigger
5. Resolve the Beifong's Bounty Hunters trigger, returning it from your graveyard to the battlefield tapped
6. Resolve the Alharu trigger, creating a 1/1 Spirit creature token
7. Resolve the Grimgrin ability, putting a +1/+1 counter on Grimgrin and untapping it 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