Opera heard in his earlier operas such as "Der fliegende Holländer", "Tannhäuser" and "Lohengrin"; and he was prepared to violate accepted musical conventions, such as tonality, in his quest for greater expressivity. In his mature music dramas, "Tristan und Isolde", "Die Meistersinger von Nürnberg", "Der Ring des Nibelungen" and "Parsifal", he abolished the distinction between aria and recitative in favour of a seamless flow of "endless melody". Wagner also brought a new philosophical dimension to opera in his works, which were usually based on stories from Germanic or Arthurian legend. Finally, Wagner built his own opera house at Bayreuth with part
Mercy (GOOD Music song) was released onto the Internet the following day onto West's official website. The song serves as the first official single from "Cruel Summer", an album by West's record label GOOD Music. The release of the track continued West's "GOOD Fridays", a music giveaway that provided free MP3 downloads every week, which had been on hiatus since December 2010. The song features Big Sean and Pusha T, rappers both signed to West's GOOD Music, along with 2 Chainz, all delivering a verse each along with West. Speaking about his feature, 2 Chainz stated that "I've done a lot of work with