Thank you for the feedback! Originally it was just going to be on crits but i wanted it to be pretty constant throughout the game i might tweak it so it's whenever the pendulum swing instead.
Hey I might be wrong as well. It's one of those things that probably requires some play testing!
I’d say: A pretty loud ticking timer for the 1d10 minutes of the pendulum swing and a 1 in 6 chance upon entering a room, to activate the table.
Yes that sounds very workable :)