this game is theoretically farmable
when you beat a demon you get something right? you can offer the thing for infinite fights, so with a TAS system you could technically farm
I believe time passes whenever you finish a fight so you would not be able to do it forever.
you could still just farm until you have to refight the ancient one
8 hours pass by whenever a Boss is defeated so after 21 Sacrifights,you would have to fight the Anceint one