I guess we all missed it.
Having the rose illusion cause the custom nightmare is a good start. I'm not sure that the illusion was updated after nightmare was moved to 715 and all that, and given many options.
A custom illusion sounds cool, but what sort of thing did you have in mind?
The idea I get which is neat and also relatively easy to implement would be a custom form for a demonic illusion of a certain type.
>An officer of the Sorcerer Guild arrives and glances around. "Ah, there you are, Vathon!" he says in a slightly agitated tone. "I have come to formally declare that your membership privileges have been revoked."