It looks like now Jason Momoa‘s take on the DC superhero Aquaman will be facing a powerhouse villain as a third has been revealed.

Dolph Lundgren (left) has joined James Wan‘s film as the villain Nereus (right), overlord of the aquatic kingdom of Xebel and a general villain in the Aquaman universe. Lundgren has joined Yahya Abdul-Mateen II, who is playing Black Manta and Patrick Wilson, who will play primary villain and half-brother to our hero, Ocean Master.

Amber Heard and Willem Dafoe co-star in the film, which is due for release on December 21, 2018 from DC and Warner Bros. Pictures.

H/T: Den of Geek!