You've probably already seen photos of the Avengers-themed birthday bash [1] Kylie Jenner [2] threw her boyfriend, Travis Scott, but what you might have missed was that tattoo artist JonBoy [3] was there to give him and his friends some fresh ink. Among the guests at the party was Kid Cudi [4], fellow rapper and occasional collaborator with Scott.

The pair received matching "Rager" tattoos, written in red ink, sealing their friendship forever. Perhaps not coincidentally, Cudi has a song from 2010 titled "Mr. Rager." The pair showed off their tattoos in a photo from the party posted by photographer Rayscorruptedmind [5] on Twitter.