Game of Thrones‘ Natalie Dormer is venturing into White Walker territory with her next role. The actress FKA Margaery Tyrell is joining Penny Dreadful: City of Angels — Showtime’s “spiritual descendant” of the original Penny Dreadful — as a supernatural-tinged series regular, TVLine has learned. 

City of Angels — which is being shepherded by Penny Dreadful creator John Logan — is set in 1938 Los Angeles and features an all-new cast of characters. The series will be “deeply infused with Mexican-American folklore and social tension” and feature an “exciting mix of the supernatural and the combustible reality of the period, creating new occult myths and moral dilemmas within a genuine historical backdrop.”

Dormer, whose credits also include Showtime’s The Tudors, CBS’ Elementary and Netflix’s forthcoming Dark Crystal sequel series, will play Magda, a supernatural demon who can take the appearance of anyone she chooses and manifests in a number of guises throughout the story. Charismatic, clever and chameleonic, Magda is a dangerous enemy and an invaluable ally.

Dormer joins a cast that also includes Fear the Walking Dead‘s Daniel Zovatto, The Purge‘s Jessica Garza and New Amsterdam‘s Johnathan Nieves.