Dockside Extortionist + Barrin, Master Wizard

Dockside Extortionist
Barrin, Master Wizard

Requires
Dockside Extortionist in hand. Barrin on the battlefield. Your opponents control at least six artifacts and/or enchantments. 1r available.
Steps
  1. Cast Dockside Extortionist by paying 1r
  2. Dockside Extortionist enters the battlefield, creating at least six Treasure tokens
  3. Activate four Treasure tokens by tapping and sacrificing those, adding r and three mana of any color
  4. Activate Barrin by paying 2 and sacrificing a Treasure token, returning Dockside Extortionist to hand
  5. Repeat
Results
Infinite ETB. Infinite colored mana. Infinite storm count. Infinite sacrifice triggers. Infinite Treasure tokens.