Cauldron of Souls + Dross Scorpion + Arsenal Thresher + Blasting Station

Cauldron of Souls

Dross Scorpion

Arsenal Thresher

Blasting Station

How it works

1. Activate Cauldron of Souls by tapping it, giving Arsenal Thresher persist until end of turn.
2. Activate Blasting Station by tapping it and sacrificing Arsenal Thresher.
3. When Arsenal Thresher dies, its persist ability and Dross Scorpion trigger.
4. Resolve the Dross Scorpion trigger, untapping Cauldron of Souls.
5. Resolve the Arsenal Thresher trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it, and then choosing to reveal at least one artifact card from your hand to remove the -1/-1 counter.
6. When Arsenal Thresher enters the battlefield, Blasting Station triggers, untapping Blasting Station.
7. Resolve the Blasting Station ability from step 2, dealing 1 damage to any target.
8. Repeat.

This clever loop turns the mechanical interaction between death and rebirth into an engine of pure destruction, helmed by Cauldron of Souls granting persist to Arsenal Thresher. When Blasting Station sacrifices the Thresher, it triggers Dross Scorpion to untap the Cauldron while the Thresher's own persist brings it right back with a -1/-1 counter. The genius here is that Arsenal Thresher's replacement effect lets you reveal artifact cards from your hand as it enters to slap on a +1/+1 counter, which instantly neutralizes that pesky -1/-1 counter via state-based actions. Finally, every single time the Thresher re-enters the battlefield, Blasting Station untaps itself so you can rinse and repeat, letting you machine-gun down any target with infinite damage.