Matt would like to try to hold a seance to contact the spirits of the dead that may be in the manor. If I get the green light from you, I'd be looking to solicit interest over the next few weeks and try doing it sometime in October.

Tactics Matt would employ include:

Using any available leftovers from the feast--gourds, table decorations, cherry stems, what have you--as focuses. He'd also try and use the Is It Cake scry around the manor to see if there's any more transmogrified decor items he could filch. Other potential ingredients include mud from the lake, a breakfast egg.

Conducting the seance with people of varying abilities (psychics, normies, magic users if possible) and stages of life (vampires, alive, worried they might be dead).

He may rig up a spirit board!

In terms of specific goals, I think Matt mainly wants to make contact and see what's out there. He would definitely want to ask the basics if the opportunity presented itself: who are you, how/when did you die. Matt is willing to become possessed if a spirit felt more comfortable engaging that way.

Idk how this might overlap with October events, but uhhh tl;dr: What might happen if Matt tried to do a seance?