Cast Dockside Extortionist by paying {1}{R}.
Dockside Extortionist enters the battlefield, creating at least six Treasure tokens.
Activate six Treasure tokens by tapping and sacrificing them, adding {2}{W/U}{R}{R}{R}.
Cast Vadrok for its mutate cost by paying {1}{W/U}{R}{R} plus commander tax if applicable, putting it on top of Dockside Extortionist.
The Vadrok mutated creature triggers, allowing you to cast Unexplained Disappearance from your graveyard without paying its mana cost.
Resolve Unexplained Disappearance, returning Vadrok and Dockside Extortionist from the battlefield to your hand and causing you to surveil 1.
Repeat.
If your opponents control at least seven artifacts and/or enchantments, this combo produces infinite Treasure tokens.

Infinite colored mana

Infinite ETB

Infinite LTB

Infinite magecraft triggers

Infinite self-mill

Infinite storm count

Infinite surveil

Infinite Treasure tokens

Vadrok, Apex of Thunder

Dockside Extortionist

Unexplained Disappearance

Combos with "Unexplained Disappearance"