Brilliance Unleashed + Lithoform Engine + Krark-Clan Ironworks + Zirda, the Dawnwaker + Garna, the Bloodflame

Brilliance Unleashed

Lithoform Engine

Krark-Clan Ironworks

Zirda, the Dawnwaker

Garna, the Bloodflame

How it works

1. Cast Brilliance Unleashed by paying 4. Choose its second mode, targeting any artifact card in your graveyard.
2. Holding priority, activate Lithoform Engine's second ability by paying 1 due to Zirda and tapping it, targeting Brilliance Unleashed.
3. Holding priority, activate Krark-Clan Ironworks by sacrificing Lithoform Engine, adding CC.
4. Resolve the Lithoform Engine ability, copying Brilliance Unleashed, targeting Lithoform Engine.
5. Resolve the copy of Brilliance Unleashed, returning Lithoform Engine from your graveyard to the battlefield as a 3/3 Robot artifact creature.
6. Repeat from step 2.

By casting Brilliance Unleashed to return Lithoform Engine from your graveyard, you set up a brilliant recursive loop fueled by Zirda, the Dawnwaker reducing the copy ability's activation cost to just one generic mana. Krark-Clan Ironworks plays a vital role here as the engine's sacrifice outlet, funding the copied activations while generating a steady stream of colorless mana from the artifacts themselves. Because Garna, the Bloodflame and Zirda round out your options, this setup easily turns your graveyard into an endless workshop for artifact loops, generating infinite triggers of every flavor you could possibly desire.