It says it is a reenactment of a black Mass. Does that mean that they do not have a true priest so that Our Lord will not be present?
I'm not a black Mass expert, but I think that they usually just have a consecrated Host, upon which outrages are committed.
How they get their infernal hands on the Blessed Sacrament probably varies.
Black Masses are one of those ugly realities that most people are blissfully unaware of.
If we only knew what went on under cover of darkness all over the world...
All too often, I really don't want to know what 'goes on' -- this new popularity of "reality TV" is an example of how people can become obsessed with what's going on 'under cover of darkness'.
From what I hear, they don't need a priest just a host. They have a warlock or maybe even a witch do the ceremony, in which the TLM is basically conducted in reverse order. Whether they pronounce each word backwards or start with the last word and go backwards toward the first word or merely read each paragraph or prayer beginning with the last one and receed to the first one, I do not know. But they use a reverse order.
When they get to the consecration, nothing happens, of course (usually), because the host has already been consecrated and there is no priest (usually).
As you know, all a real priest has to say is the formula for consecration for it to be effective. The entire Mass in proper order is not required for the consecration to be valid, so a priest could conceivably consecrate bread in a bakery and wine in a winery by having the intention and saying the words, and it would be a grave matter, a blasphemy and mortal sin, but it would be a real consecration. There does need to be the host and the chalice of wine consecrated, perhaps in that order. It's arguably invalid to consecrate only the bread or only the wine. But once they're consecrated then the host can be taken away to a distant location and it's still a real Communion host (which is how priests carry Viaticuм to shut-ins).
There have reportedly been cases where priests have done this (black mass), which is a good reason why handing out Holy Orders like Halloween treats is not a good idea. But a more pressing concern IRL is that "defrocking" a priest ought to be a last resort because if it is done unjustly, such a one might be more likely to 'retaliate' by turning toward such a nefarious purpose as black masses.
At some point, ignorance is bliss. When one finds oneself getting fascinated with such things, it's time to get away from it. I have been unable to read certain books because of the temptation to think about them too much, for example, all the time.
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