The Words I Want To Know is the 210th chapter of Tsubasa: Reservoir Chronicle.
The Clone continues to summon magic which drags the viewing portal Fei Wong Reed had been using to spy on the group. In a fit of rage, Fei Wong removes his sword from the Clone, and he collapses into the arms of Syaoran. Syaoran asks why the Clone had done what he had, and the Clone simply replies "To hear what came next. Last time, I didn't hear all of what [Sakura] was saying." He ejects the magic from his right eye, and tells Syaoran to bring the feathers to the Clone Sakura. He then apologises to everyone, calling Syaoran by that name (which surprises him), before he disintegrates in the arms of his original self.