Portals is a score cue from the 2019 Marvel film Avengers: Endgame, composed by Alan Silvestri. The track underscores the scene where the heroes arrive through portals for the final battle, which made it instantly memorable to audiences. Online, that emotional build and triumphant release turned it into a go-to audio for epic entrances, reunion edits and comeback videos. It is still widely used because even a short excerpt signals hope, scale and a last-minute turnaround with almost no setup.