Song: http://www.mediafire.com/download/xjz1q93yuhyrhz1/You%27ll+Play+Your+Part+%28Final+Boss+Remix%29.mp3

After Twilight sacrificed her magic and got her key from Discord. They went to the Tree of Harmony to open the chest, which had rainbow power. The Mane 6 prepare themselves for one final battle against Tirek. He tried to attack them, but it wasn't effective against the rainbow magic. They defeat Tirek and restored peace to Equestria by giving the magic back to everypony, including Celestia, Luna, and Cadence. After that was done, the chest grew into Twilight Sparkle's kingdom and Twilight is now the princess of friendship.

MLP by Hasbro