Danitha, Benalia's Hope, Grimgrin, Corpse-Born, and Changing Loyalty

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Changing Loyalty on the battlefield

Steps

1. Activate Grimgrin by sacrificing Danitha When Danitha dies, Changing Loyalty triggers, returning Danitha from your graveyard to the battlefield tapped
2. When Danitha enters the battlefield, it triggers, returning Changing Loyalty from your graveyard to the battlefield attached to Danitha
3. Resolve the Grimgrin ability
4. Repeat

Results

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