Sekki, Seasons' Guide, One with the Kami, and Grimgrin, Corpse-Born

Prerequisites

• Sekki, Seasons' Guide on the battlefield
• One with the Kami on the battlefield
• Grimgrin, Corpse-Born on the battlefield

Steps

1. Activate Grimgrin by sacrificing Sekki When Sekki dies, One with the Kami triggers, creating at least eight 1/1 Spirit creature tokens
2. Resolve the Grimgrin ability
3. Activate Sekki by sacrificing eight Spirits, returning it from your graveyard to the battlefield
4. Repeat

Results

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