Star Wars: The Clone Wars, Season 4

Dooku:
Welcome to Serenno. You have been invited here because you are the best bounty hunters in the galaxy. Kiera Swan, two-time winner of the Obsidian Sphere. Derrown, known simply as 'The Exterminator'. Sixtat, the Outlands Butcher. Embo, your bounty tallies were second only to one last season. Cad Bane, needs no introduction. Rako Hardeen, the Marksman of Concord Dawn. Jakoli, known for never bringing anyone back alive. Onca, you and your brother have been a legendary team. This challenge may prove difficult for you alone. Twazzi, your acrobatics once earned you praise from Chancellor Valorum. Sinrich, inventor of the holographic disguise matrix. And finally, Mantu. Your people were once a peaceful race. How far they have fallen. In a few moments, all eleven of you will enter what we call the Box.