Retrofitter Foundry + Dross Scorpion + Stridehangar Automaton

Prerequisites

• You control a Thopter.

Steps

1. 1Activate Retrofitter Foundry's fourth ability by tapping it and sacrificing a Thopter.
2. 2When the Thopter dies, Dross Scorpion triggers, untapping Retrofitter Foundry.
3. 3Resolve the Retrofitter Foundry ability, creating a 4/4 Construct and a 1/1 Thopter artifact creature token.
4. 4Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite creature tokens
• Infinite death triggers