Ghired, Mirror of the Wilds, Goblin Sharpshooter, and Grimgrin, Corpse-Born

Prerequisites

• Ghired, Mirror of the Wilds on the battlefield
• Goblin Sharpshooter on the battlefield
• Grimgrin, Corpse-Born on the battlefield

Steps

1. Create a creature token
2. Activate Goblin Sharpshooter by tapping it, creating a copy of the creature token
3. Activate Grimgrin by sacrificing a creature token
4. When the creature token dies, Goblin Sharpshooter triggers, untapping itself
5. Resolve the Grimgrin ability Repeat from step 2
6. Activate Grimgrin by tapping it, creating a token copy of any creature token you control that entered the battlefield this turn
7. Activate Grimgrin by sacrificing the creature token created in step 1, untapping Grimgrin and putting a +1/+1 counter on it
8. Repeat

Results

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