Students from the Harvard Extension School at Harvard University are hosting a “Satanic black mass,” which will take place tonight in Cambridge, Massachusetts.

“A black mass ceremony is a ritual performed by satanic cults to parody the Catholic Church Mass. Historically, the ceremony features a ritual of sacrilege of the Catholic host, or the sacred bread used in the Eucharist, which becomes the body of Jesus Christ upon consecration,” the Harvard Crimson explains.