Majin Buu
Majin Buu, also known as Djinn-Boo, is a magical life form created by the evil warlock Bibidi. He terrorized galaxies by destroying entire planets, but was eventually sealed away. After Bibidi's death, Buu remained hidden until he was revived by Bibidi's son Babidi. Buu then set out to conquer the entire universe, but was eventually defeated by Goku and his friends.