This seems intriguing. I recall something of this sort being discussed elsewhere, and I would tend to agree that limiting space could have a positive impact on the course of a role-play of this sort. That said, I am not altogether certain as to whether I could manage another undertaking at this point, so consider this a tentative display of interest at best. Out of curiosity, how much control over the aesthetic aspects of the unknown force/entities/objects would one have if playing as a custodian, and how familiar would one be with it in-character(s)?