Smaug the Impenetrable + Battered Golem + Heavy Arbalest

Smaug the Impenetrable

Battered Golem

Heavy Arbalest

How it works

1. Activate Battered Golem using the ability granted to it by Heavy Arbalest by tapping it, dealing 2 damage to Smaug.
2. Smaug triggers, creating two Treasure tokens.
3. When the Treasure enters, Battered Golem triggers twice.
4. Resolve the first Battered Golem trigger, untapping it.
5. Holding priority, activate Battered Golem by tapping it, dealing 2 damage to any target.
6. Resolve the second Battered Golem trigger, untapping it.
7. Repeat.

This engine relies on transforming ping damage into a self-sustaining loop by turning Battered Golem into a rapid-fire artillery piece with Heavy Arbalest. When Battered Golem taps to ping Smaug the Impenetrable, Smaug's triggered ability converts that noncombat damage into a pair of shiny new Treasure tokens. Because those artifacts enter the battlefield, Battered Golem's static trigger fires twice to untap the creature, letting you float mana, sink damage into any target, and keep the mechanical loop spinning indefinitely.