Tatterkite, Dross Scorpion, Cauldron of Souls, and Arcbound Ravager

Prerequisites

• Tatterkite on the battlefield
• Dross Scorpion on the battlefield
• Cauldron of Souls on the battlefield
• Arcbound Ravager on the battlefield

Steps

1. Activate Cauldron of Souls by tapping it, giving Tatterkite persist until end of turn
2. Activate Arcbound Ravager by sacrificing Tatterkite
3. Tatterkite dies, triggering its persist ability and Dross Scorpion
4. Resolve the Tatterkite trigger, returning it from your graveyard to the battlefield with no -1/-1 counters on it
5. Resolve the Dross Scorpion trigger, untapping Cauldron of Souls
6. Resolve the Arcbound Ravager ability from step 2, putting a +1/+1 counter on it
7. Repeat

Results

• Infinite +1/+1 counters on Arcbound Ravager
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers