When Dockside Extortionist enters the battlefield, it triggers, creating at least six Treasure artifact tokens.
Activate four Treasure tokens by tapping and sacrificing them, adding ({3} magic symbol) ({B} magic symbol) .
Activate Makeshift Munitions by paying ({1} magic symbol) and sacrificing Dockside Extortionist, dealing 1 damage to any target.
Activate Ruthless Technomancer by paying ({2} magic symbol) ({B} magic symbol) and sacrificing two Treasure tokens, returning Dockside Extortionist from your graveyard to the battlefield.
Repeat from step 2.
If opponents control at least seven artifacts and/or enchantments, this combo nets infinite Treasure tokens and colored mana.