Dross Scorpion + Detective's Satchel + Yahenni, Undying Partisan

Dross Scorpion

Detective's Satchel

Yahenni, Undying Partisan

How it works

1. Activate Detective's Satchel by tapping it, creating a 1/1 Thopter artifact creature token.
2. Activate Yahenni by sacrificing the Thopter.
3. When the Thopter dies, Dross Scorpion triggers, untapping Detective's Satchel.
4. Resolve the Yahenni ability.
5. Repeat.

This cunning loop puts Dross Scorpion's relentless metal-crafting trigger to work as an untap engine, fueled entirely by the cycle of sacrifice and creation. By tapping Detective's Satchel to hatch a Thopter token, you set up the fodder needed for Yahenni, Undying Partisan to consume the mechanical insect. Each time Yahenni devours that Thopter, the Scorpion springs to action to untap the Satchel, allowing you to instantly forge a brand-new Thopter and repeat the entire sequence indefinitely.