Nick Valentine, Private Eye, Stridehangar Automaton, and Umbral Collar Zealot

Prerequisites

• Nick Valentine, Private Eye on the battlefield
• Stridehangar Automaton on the battlefield
• Umbral Collar Zealot on the battlefield

Steps

1. Activate Umbral Collar Zealot by sacrificing another artifact creature
2. When the creature dies, Nick Valentine triggers, creating a Clue token and a 1/1 Thopter artifact creature token
3. Resolve the Umbral Collar Zealot ability
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite Clue tokens
• Infinite surveil 1