Eloise, Nephalia Sleuth + Phyrexian Altar + Stridehangar Automaton

UB identity

Commander legal

The 3 combo pieces

• Eloise, Nephalia Sleuth
• Phyrexian Altar
• Stridehangar Automaton

How to execute it

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 Thopter artifact creature token.
4. Resolve the second trigger, if applicable, causing you to surveil 1.
5. Repeat.

What the combo produces

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