Maybe it's Patience AND the basement ghosts. Or a completely new ghost with a ghost power so gnarly, it made Jay freak out! But hey, I'm just spit balling here.
I also think it is Patience. Or they always knows how to show the unexpected in twists could be another ghost from Isaac, Nigel or someone else’s past.
The only thing about Nigel the walking red flag parade (he has cheated, lied to, gaslight, and purposely caused friction between Issac and his friends) that I found decent was him being a friend to Nancy the basement ghosts. Now he excludes Nancy from his wedding, and was rude to Jay? Nope. I cannot stand him.
