I never thought of Satan being present at the Last Supper, but John 13 says that Satan entered into Judas Iscariot there. (Luke says it was before, and both accounts could be true).
It is interesting that Jesus waited to say many things until after Judas, and presumably Satan also, left. Judas had had his feet washed by Jesus, and had heard that he was to do the same.
Satan was probably still possessing Judas in the garden of Gethsemane, when he kissed Jesus.
Jesus could have cast Satan out, but did not.
Dorothy Sayers at one point wrote an essay, I think it was: "The Dogma is the Drama".
This song is haunting, although not directly applicable to my personal experience.
There's an interesting semi-parallel in Revelation 7:17 and 8:1:
"...and God shall wipe all tears from their eyes. And when he had opened the seventh seal, there was silence in heaven about the space of half an hour."
Some years back there were some public comments from famous authors about the Susan in the Narnia books not being present for the Final Battle and what followed. It was framed as bigotry against women and people of average morals.
Neil Gaiman's came in the form of a short story, "The Problem of Susan," which from an excerpt I found is apparently quite vile.
Gaiman has fallen out of public favor as allegations against him have begun to surface.
Two other authors were J. K. Rowling, who ought to know better, and Phillip Pullman, who also writes vile stories, I've been told.
Pastor Douglas Wilson has a lucid, sensitive, and rather long rebuttal to the Problem of Susan; link below.
My own, lesser contribution here, is that C. S. Lewis was a fan of George MacDonald, and MacDonald wrote some vivid portrayals of spiritual devolution. In The Princess and Curdie, Curdie was given the ability to discern which beast a person's moral character was descending into by holding their hand. In ...