Saffi Eriksdotter, Grimgrin, Corpse-Born, and Hero of the Dunes

Prerequisites

• Saffi Eriksdotter on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Hero of the Dunes on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting Hero of the Dunes Activate Grimgrin by sacrificing Hero of the Dunes When Hero of the Dunes dies, Saffi triggers, returning Hero of the Dunes from your graveyard to the battlefield
2. When Hero of the Dunes enters, it triggers, returning Saffi from your graveyard to the battlefield
3. Resolve the Grimgrin ability
4. Repeat

Results

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