

I love those in particular just because of how absolutely inescapable they are. If the Hounds are hunting you then you’re going to be found. Period, done, end of story. You can’t exist in a place that has geometry without throwing open a door for them.
I’m sure at least one mad wizard has sealed himself inside a perfect spherical prison with no corners only to find that the Cornerhounds don’t much care what corners they come from, and your knees and elbows work just fine if better solutions aren’t available.
No man can hide from the ravages of Time. It (and by extension, they) can reach you no matter where you try to hide away, corners or no.