"Morph" is a song written and recorded by American musical duo Twenty One Pilots from their fifth studio album, Trench (2018). It was released as a promotional single the same day as the album's release. The song was written by vocalist Tyler Joseph in a studio in his basement. It was produced by Joseph, with co-production from Paul Meany of Mutemath, and recorded at United Recording Studios in Hollywood, California. Even though the song is one of the less conceptual of their concept album, it still reveals more about the surroundings of a world named "Trench" and a city called "DEMA". A key discovery comes in "Morph" with the identity of Nicolas Bourbaki, the titular character of the song "Nico and the Niners" and one of the main antagonists in the story.