Kiki-Jiki, Mirror Breaker, Grimgrin, Corpse-Born, and Sister Hospitaller

Prerequisites

• Kiki-Jiki, Mirror Breaker on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Sister Hospitaller on the battlefield

Steps

1. Activate Kiki-Jiki by tapping it, targeting Sister Hospitaller Holding priority, activate Grimgrin by sacrificing Kiki-Jiki Resolve the Kiki-Jiki ability, creating a token copy of Sister Hospitaller with haste
2. When the Sister Hospitaller token enters, it triggers, returning Kiki-JIki from your graveyard to the battlefield and causing you to gain 5 life Repeat

Results

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