Smaug the Impenetrable + Metalwork Colossus + Mondrak, Glory Dominus + Goblin Bombardment

Smaug the Impenetrable

Metalwork Colossus

Mondrak, Glory Dominus

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing Metalwork Colossus, dealing 1 damage to Smaug.
2. Smaug triggers, creating two artifact tokens due to Mondrak.
3. Activate Metalwork Colossus by sacrificing the two artifact tokens, returning Metalwork Colossus from your graveyard to your hand.
4. Cast Metalwork Colossus by paying 0.
5. Repeat.

This ingenious loop turns a self-referential cycle of destruction and rebirth into an infinite engine, powered entirely by how these specific permanents interact. You begin by using Goblin Bombardment to fling Metalwork Colossus at Smaug the Impenetrable, dealing the noncombat damage that awakens Smaug's trigger to make Treasure tokens. Thanks to Mondrak, Glory Dominus doubling every token created, that single point of damage yields twice as many riches. Those newly minted artifacts not only pay the cost to return Metalwork Colossus from your graveyard to your hand, but their massive combined mana value also fuels Metalwork Colossus's passive cost reduction, allowing you to recast it for free and repeat the carnage indefinitely.