Satanists planning to hold a black mass at a public facility later this month in Oklahoma say they've sold all 88 tickets that were available for the event.

The Dakhma of Angra Mainyu, which is holding the Sept. 21 mass at the Oklahoma City Civic Center Music Hall, is promising an event that is "enlightening but educational," according to a description on the Civic Center's website.

"One of the dictates of the church is not only to educate the members but to educate the public and to debunk the Hollywood-projected image of our beliefs," Adam Daniels told ABC News. Daniels is a registered sex offender, convicted in 2009 of "sexual battery of persons over the age of 16," according to the state's sex offender registry, which notes that he has satanic tattoos "all over body."

In order to comply with local laws, the group had to make a few changes to the ritual. Instead of using urine, participants plan to use vinegar. Instead having a naked woman on an altar, she'll be wearing lingerie. And instead of spitting on a consecrated host, they will spit on an unconsecrated one, according to ABC.

The group was reportedly in possession of a stolen consecrated host, causing the local archdiocese to sue. It was returned to the archdiocese by an attorney representing Daniels.

“I am relieved that we have been able to secure the return of the sacred Host and that we have prevented its desecration as part of a planned Satanic ritual,” Archbishop Paul Coakley told the National Catholic Register. “I remain concerned about the dark powers that this Satanic worship invites into our community and the spiritual danger that this poses to all who are involved in it, directly or indirectly.”

Coakley also called the event "very transparently a blasphemous mockery of the Mass."

But not every religious group is riled.

"As a church, we want to respond as people of love, who are consistent with the teachings of Jesus and the ways he responded to those who rejected him and even hated him," Tom Mannin, the pastor of Oklahoma City Community Church, wrote on the organization's website in remarks spotted by the Christian Post.

His church also uses the civic center for its services.