Kolodin, Triumph Caster + Salvaging Station + Clown Car + Yahenni, Undying Partisan

Kolodin, Triumph Caster

Salvaging Station

Clown Car

Yahenni, Undying Partisan

How it works

1. Activate Salvaging Station by tapping it, returning Clown Car from your graveyard to the battlefield.
2. When Clown Car enters, Kolodin triggers, causing Clown Car to become an artifact creature until end of turn.
3. Activate Yahenni by sacrificing Clown Car.
4. When Clown Car dies, Salvaging Station triggers, untapping Salvaging Station.
5. Resolve the Yahenni ability.
6. Repeat.

This recursive loop relies on Salvaging Station and its ability to constantly recur Clown Car from the graveyard whenever a creature dies. Thanks to Kolodin, Triumph Caster, the returning Clown Car automatically animates as a creature upon entering the battlefield, making it an eligible target to be fed directly to Yahenni, Undying Partisan's sacrifice ability. Each time Yahenni consumes the car, the resulting death trigger satisfies Salvaging Station's untap condition, allowing the station to immediately pull Clown Car back out of the graveyard and restart the engine for an infinite loop of sacrifices.