Immigrant Song was released by Led Zeppelin in 1970 as the opening track of Led Zeppelin III, with lyrics inspired by Norse mythology and the band's tour of Iceland. Its driving riff and Plant's distinctive wail made it an instant rock anthem, and it later reached a new audience when it was used in the 2017 film Thor: Ragnarok. Since then it has become a go-to sound for trailers, sports highlights and online edits, where its short, punchy opening instantly signals power, confidence and a larger-than-life arrival.