Glint-Horn Buccaneer by paying ({1} magic symbol) ({R} magic symbol) and discarding a card.
Glint-Horn Buccaneer triggers, dealing 1 damage to each opponent.
Malcolm triggers, creating a Treasure token for each opponent dealt damage this way.
Resolve the
Glint-Horn Buccaneer ability, causing you to draw a card.
Activate two Treasures by tapping and sacrificing them, adding ({1} magic symbol) ({R} magic symbol) .
Repeat from step 2.
Notes
The combo stops creating enough Treasures once you have one opponent remaining. If you start the combo with three or more opponents, you will make additional Treasures each iteration, which you could use for extra iterations while you only have one opponent. Depending on the life totals of your opponents and your deck size, the combo may also stop once your library is empty.