Dungeon 23 Project - The Ruins of Mount Auyán (Day 073)

You retreated to the right side Door #7 room and hang out there and eventually the Cube of Death passes leaving the corridor spotlessly clean. You peak out the door and see it turn the corner back at the T.

What do you do? Try one of the Door #8 again or move on?

OK, Door #8 it is, left or right?

OK, right side first.

The door opens right away this time, perhaps the Cube of Death lubricated the hinges or broke up some of the rust. This room is 30'x30' and the floor sunken about a foot below the corridor and has a sandy bottom to it. As you examine the room you note that the sand is very clean and before you stepped in there was not  mark in the sand at all. There is nothing else in the room and the walls are bare. 

If they are lucky that will find one or more of the three secret doors in this room. Or not.

One secret door leads to a stairway going up (only), one leads to a stairway going down (only) and one leads to a 10'x10' room which holds a what looks like a trollish human that is frozen solid.

What do you do?