Saffi Eriksdotter, Grimgrin, Corpse-Born, and Renegade Rallier

Prerequisites

• Saffi Eriksdotter on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Renegade Rallier on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting Renegade Rallier Activate Grimgrin by sacrificing Renegade Rallier When Renegade Rallier dies, Saffi triggers, returning Renegade Rallier from your graveyard to the battlefield
2. When Renegade Rallier 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