"Deadpool 2" has found another bad guy — but his identity remains unclear.

"The Strain" actor Jack Kesy as a major villain. Though his exact role is unknown, sources tell the site that he could be playing Black Tom, a Dublin mutant who can manipulate and project energy through plant life. In the "X-Men" comics, he usually sends blasts through wooden shillelagh.

Kesy is just the latest new cast member to hop on board "Deadpool 2." Josh Brolin is joining as the main villain, Cable, and "Atlanta" star Zazie Beetz will play Domino.

Ryan Reynolds reprises his role as the titular, foul-mouthed, snarky merc mutant. Morena Baccarin also returns as his love interest Vanessa, Stefan Kapacic as Colossus, and Brianna Hildebrand as Negasonic Teenage Warhead.

On "The Strain," which premieres for a fourth and final season in July, Kesy plays a goth rocker who's one of the first to be infected with the virus that turns everyone in vampires.

"Deadpool 2" opens in theaters June 1, 2018.