The golum shoulf (if thinking logically) be stronger then a minotaur (when alone as the space would be hard to fight in with 2 minos (logically cause taking space and force needed to prevent a minotaur from breaking in)
I was thinking, perhaps the golum could sence DNA (but cant speak or hear)

And wi r h the door
there is a unlock mechanism for the humans (incl. Shar) to use
otherwise its guarded by powerful ancient and lost magic

at least that was what I was thinking
(Sadly I have not gotten a chance to get behibd a comp today)