Drake has begun legal action against Universal Music Group and Spotify, alleging they conspired to falsely pump up the popularity of Kendrick Lamar’s “Not Like Us,” a song that viciously attacked Drake amid a bitter feud between the two hip-hop superstars.

Musician Drake alleges that Universal Music Group “conspired” to artificially boost Kendrick Lamar’s searing diss track “Not Like Us” on Spotify, according to a pre-action petition submitted to a New York court on Monday.