To the Victor...

Walkthrough

 * This mission begins during the cutscene that ends The Man in Black, and ends in that same cutscene as well if you are successful, instantly added it to your completed list and flagging An Extraordinary Gentleman.
 * Beat Teodor in Boom or Bust three times before he wins three times.
 * During the cutscene, Bastingart will explain the rules if you ask for them.

Boom or Bust

 * Boom or Bust essentially works like a competitive game of Phantom Roll, with three tricks that can tip the odds in one person's favor.