This arcane facility allows us to perform magic rites needed to get all sorts of magical stuff (not all magical stuff requires it, though). It provides workspace for 10 Runts for that purpose. It also provides workspace for 3 Brainers. Just be careful during Hideout Defenses, who knows what can be accidentally summoned amidst the ensuing chaos...
Constructing this facility requires 10 Hypno Panels. Only a single Summoning Circle allowed per Hideout. Requires Library present.