Threshold in Club Vanquisher guarded by Untouchable ogres, the barrier keeping loose gods tethered.
The Basilica Entrance of Club Vanquisher on The Twelfth Floor is what the Basilica Guards exist to guard. Because they worship Taranis and carry Untouchable status, they are among the very few non-deities who can — at least temporarily — stop a god from passing a threshold.
The dungeon's own warning is explicit: you don't want these guys to leave their post, because if they do, the basilica's entrance stands wide open, the bored gods hanging out in the halls may notice, and some of those naughty gods may wander off untethered. Carl routs two guards off their posts within minutes of reading that warning, while gods are already leaving the realm.
A guarded threshold within Club Vanquisher, held by a permanent detail of golden-skinned ogre clerics.
The divine chokepoint whose abandonment lets gods roam free.