Smaug the Impenetrable + Metalwork Colossus + Blasting Station + Kaya, Geist Hunter

Smaug the Impenetrable

Metalwork Colossus

Blasting Station

Kaya, Geist Hunter

How it works

1. Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.
2. Activate Blasting Station by tapping it and sacrificing Metalwork Colossus, dealing 1 damage to Smaug.
3. Smaug triggers, creating two artifact tokens due to Kaya, Geist Hunter.
4. Activate Metalwork Colossus by sacrificing the two artifact tokens, returning Metalwork Colossus from your graveyard to your hand.
5. Cast Metalwork Colossus by paying 0.
6. When Metalwork Colossus enters, Blasting Station triggers, untapping Blasting Station.
7. Repeat from step 2

This explosive loop turns the mighty dragon Smaug the Impenetrable into a tireless engine for treasure by leveraging the token-doubling replacement effect of Kaya, Geist Hunter. When Blasting Station hurls Metalwork Colossus at Smaug to deal that crucial noncombat damage, Kaya ensures you get double the Treasure tokens you need to feed the Colossus's own cost reduction. Finally, Metalwork Colossus happily recycles itself from the graveyard using those very same treasures, letting Blasting Station untap on the creature's return and repeat the whole cycle infinitely.