Activate Blasting Station by tapping it and sacrificing Dockside Extortionist, dealing 1 damage to any target.
Cast Disturbed Burial for its buyback cost by paying ({4} magic symbol) ({B} magic symbol) , returning Dockside Extortionist from your graveyard to your hand.
Dockside Extortionist enters the battlefield, triggering itself and Blasting Station.
Resolve the Dockside Extortionist trigger, creating a number of Treasure tokens equal to the number of artifacts and enchantments your opponent control.
Resolve the Blasting Station trigger, untapping Blasting Station.
Activate seven of the Treasure tokens by tapping and sacrificing them, adding ({5} magic symbol) ({B} magic symbol) ({R} magic symbol) .