Spontaneous rituals

Who should I email about a spontaneous ritual to ask if it’s possible at all, and vaguely what magnitude it will be?

What I want to do requires a lot of prep, and is useless if the ritual isn’t possible, so I’d rather know it’s possible OC and have to do the IC footwork and prop construction, rather than make my prop, do the footwork, and then find out the ritual is game breaking and not allowed. :smiley:

empire.rules@profounddecisions.co.uk I believe.

empire.rules@profounddecisions.co.uk in fact.