Efficient Construction + Myr Retriever + Junk Diver + Krark-Clan Ironworks

Efficient Construction

Myr Retriever

Junk Diver

Krark-Clan Ironworks

How it works

1. Activate Krark-Clan Ironworks by sacrificing Junk Diver, adding CC.
2. When Junk Diver dies, it triggers, returning Myr Retriever from your graveyard to your hand.
3. Cast Myr Retriever by paying 2.
4. Efficient Construction triggers, creating a 1/1 Thopter artifact creature token.
5. Activate Krark-Clan Ironworks twice by sacrificing the Thopter and Myr Retriever, adding CCCC.
6. When Myr Retriever dies, it triggers, returning Junk Diver from your graveyard to your hand.
7. Cast Junk Diver by paying 3.
8. Efficient Construction triggers, creating a 1/1 Thopter artifact creature token.
9. Repeat.

This clever loop is powered by Krark-Clan Ironworks, which turns your artifacts into a steady stream of colorless mana while sacrificing them to fuel the engine. By cycling your graveyard recursors—Junk Diver and Myr Retriever—back and forth into your hand, you create a self-sustaining loop where each cast is completely paid for by the sacrifice. Meanwhile, Efficient Construction watches your artifact spells hit the stack and rewards you with an endless swarm of flying Thopter tokens to close out the game.