Cold Storage + Dockside Extortionist + Trusty Packbeast

Cold Storage

Dockside Extortionist

Trusty Packbeast

How it works

1. Activate Cold Storage's first ability twice by paying 6, exiling Trusty Packbeast and Dockside Extortionist from the battlefield.
2. Activate Cold Storage by sacrificing it, returning Dockside Extortionist and Trusty Packbeast from exile to the battlefield.
3. When Dockside Extortionist and Trusty Packbeast enters the battlefield, they trigger.
4. Resolve the Dockside Extortionist trigger, creating at least ten Treasure artifact tokens.
5. Resolve the Trusty Packbeast trigger, returning Cold Storage from your graveyard to your hand.
6. Activate ten Treasures by tapping and sacrificing them, adding 10.
7. Cast Cold Storage by paying 4.
8. Repeat.
9. If opponents control eleven or more artifacts and/or enchantments, this combo nets infinite Treasure tokens and colored mana.

This loop relies on the engine room of Dockside Extortionist to more than pay for its own recycling, generating a massive influx of Treasure tokens whenever opponents boast enough artifacts and enchantments. Trusty Packbeast enters alongside it to fish Cold Storage right back out of your graveyard after you've sacrificed the artifact to trigger its mass-return effect. Finally, Cold Storage itself acts as the ultimate holding cell, exiling both creatures for six mana before letting you cash in your generated mana to recast and replay the whole setup from the top.