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

Infinite blinking

Infinite colored mana

Infinite ETB

Infinite LTB

Combos with "Treasure Hunter"