A devious record store clerk could file Lingua Ignota’s third LP, Sinner Get Ready, in the Christian Music section, causing an unassuming listener to grasp their rosary in terror to the choral intro: “Hide your children/ Hide your husbands!” Kristin Hayter, a pianist and vocalist fluent in opera, approaches Christianity with the same blood-soaked discomfort she unleashed upon rapists (2018’s All Bitches Die) and amongst demons (2019’s Caligula) – eschewing past power-electronic impulses in favor of equally devastating acoustic arrangements, while keeping her body-count-per-track average high. Not unlike Catholic Sunday services, Lingua Ignota’s unsparing, cathartic live performances have always been a blood ritual, but her appearance at the historic Paramount promises something different: two-part sets of traditional hymns preceding the hair-raising purge of heavy, alt-classical vengeance. Repent now.