When Dockside Extortionist enters the battlefield, it and Blasting Station trigger.
Resolve the Blasting Station trigger, untapping it.
Resolve the Dockside Extortionist trigger, creating at least five Treasure tokens.
Activate three Treasure tokens by tapping and sacrificing them, adding ({2} magic symbol) ({B} magic symbol) .
Activate Blasting Station by tapping it and sacrificing Dockside Extortionist, dealing 1 damage to any target.
Activate Ruthless Technomancer by paying ({2} magic symbol) ({B} magic symbol) and sacrificing a Treasure token, returning Dockside Extortionist from your graveyard to the battlefield.