"I Am the Antichrist to You" is a song by Kishi Bashi, featured in the episode A Rickconvenient Mort. The song plays as Morty and Planetina fly away from Beth Smith, with a montage of the pair doing environmentally friendly activities (including powering wind farms and stopping the poaching of elephants). As the song progresses, Planetina's actions become more aggressive, slashing car tires and burning down a congressman's home, to which Morty's expresses shock. The song fades into a scene of Planetina arguing with miners, before killing them and destroying the mining facility.
The song plays again after Morty ends his and Planetina's relationship, beginning as Beth comforts him and leading into the credits.