Eloise, Nephalia Sleuth, Chatterfang, Squirrel General, and Phyrexian Altar

Prerequisites

• Eloise, Nephalia Sleuth on the battlefield
• Chatterfang, Squirrel General on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing another creature you control, adding one mana of any color
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. Repeat

Results

• Infinite card draw
• Infinite Clue tokens
• Infinite colored mana
• Infinite death triggers
• Infinite draw triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite surveil