Hello everyone!
I've been playing Nox for the past couple of days and so far I'm pleasantly surprised.
This game has aged rather well in most aspects.

Anyway, I'm currently on a quest to retrieve the Orb in order to complete the Staff of Oblivion, but I'm stuck in this particular area.(see the screenshots below)
My guess is that in order to move those 3 stone cubes in the central room I have to go to the area on the right with those 2 moving stone cubes and activate some sort of mechanism but that door down the hallway is locked.
I've tried summoning a monster on that square next to spikes hoping that it would unlock the door, but no luck.
I've also descended to the lower level of the dungeon but that didn't help either.

What am I supposed to do here?

Thanks in advance.