Long Feng, Grand Secretariat, Grimgrin, Corpse-Born, and Herd Baloth

Prerequisites

• Long Feng, Grand Secretariat on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Herd Baloth on the battlefield

Steps

1. Put a +1/+1 counter on Herd Baloth Herd Baloth triggers, creating a creature token
2. Activate Grimgrin by sacrificing the creature token
3. When the creature token dies, Long Feng triggers, putting a +1/+1 counter on Herd Baloth
4. Herd Baloth triggers, creating a creature token
5. Resolve the Grimgrin ability
6. Repeat from step 3

Results

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