Make fun of my strange fancies all you want, I was particularly attracted to the sheer malevolence of this monster. Being imprisoned in one of these things would be no vacation: It's a hell on legs.
If I was to put my own twist on this golem, its holding chamber would be akin to an iron maiden torture device that, after killing its victim, prevents them from leaving the plane. Once destroyed, the spirit within lashes out in anger!
...Forgive me for getting side-tracked. This is a great idea, and at the end of the day it will probably get my vote.
Regards.