Eloise, Nephalia Sleuth, Chatterfang, Squirrel General, and Hammerhead, Maggia Boss

Prerequisites

• Eloise, Nephalia Sleuth on the battlefield
• Chatterfang, Squirrel General on the battlefield
• Hammerhead, Maggia Boss on the battlefield

Steps

1. Activate Hammerhead by sacrificing another creature you control
2. Eloise's first ability triggers, and Eloise's second ability triggers if the creature was a token
3. Resolve the first trigger, creating a Clue token and a 1/1 Squirrel creature token
4. Resolve the second trigger, if applicable, causing you to surveil 1
5. Resolve the Hammerhead ability
6. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite Clue tokens
• Infinite artifact tokens
• Infinite card draw
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite self-mill
• Infinite surveil