Grim Poppet, Hulking Metamorph, and Nest of Scarabs

Prerequisites

• Grim Poppet on the battlefield
• Hulking Metamorph on the battlefield
• Nest of Scarabs on the battlefield

Steps

1. Activate Grim Poppet by removing a -1/-1 counter from it, putting a -1/-1 counter on Hulking Metamorph
2. Nest of Scarabs triggers, creating a creature token
3. Activate Hulking Metamorph by removing a -1/-1 counter from it, putting a -1/-1 counter on Grim Poppet
4. Nest of Scarabs triggers, creating a creature token
5. Repeat

Results

• Infinite ETB
• Infinite creature tokens