Images: DC Comics/Syfy

The Flash has added another big name to its supervillain roster in the form of Battlestar Galactica hero Katee Sackhoff—and not only that, she’s going to be part of the show’s latest “mini-crossover” with Arrow.

Entertainment Weekly has confirmed that Sackhoff—who teased her arrival on the show in a since-deleted tweet over the weekend—will be appearing in the next season of The Flash as comics villain Amunet Black, a.k.a. Blacksmith. In the comics, Blacksmith runs an underground black market in both Central City and Keystone City, dealing in contraband for other criminals. And, after separating from her husband and fellow supervillain Goldface, she stole his golden elixir, giving her the power to fuse a suit of metal onto her body and fuse organic and inorganic matter.

Sackhoff will make her debut as Blacksmith in the fifth episode of the season, titled “Girls Night Out,” which EW also reports will be a “mini-crossover” with Arrow—Emily Bett Rickards will appear as Felicity in the episode, but no other Arrow characters were confirmed.

The Flash returns this October.