You’re open to investigate the room or try the locks on the door to the south. Or try the other rooms in the hallway behind you.

Since they seem to be arranged in a certain order, does this room look more like something from the original temple, or a hoard for the baddies who now occupy it?  Can we tell anything about the origins of the place from the urns?

Elero Investigation Check: 20

You see that this room would have once been some kind of bedroom, but hasn't been used as one for centuries. The ornaments are all new, and seem to be trophies of some kind, with the room being meticulously well ordered. A beautiful jeweled mask, a very robust and silver encrusted trident, as well as a small onyx statue of five blades all crossed together, each with an aquamarine in the hilt. This statue, you realize, is one of the few things in the room that was here originally, as it has a spot embedded in the wall specifically for it's presence.

"We should probably search this room and see if they put the Helm in here," Elero offers.

Erix agrees and helps looking for it.

Perception: 13

Mark sits on the guard, silently looking at the exit.

Although the trophies in here are very nice, they mostly seem to be decorative. You do not find the Helm in here. The only other thing of interest is the double locked door to the south.

"Well nothing here it seems, let's look behind the locked doors, shall we?"

Mark will get up and move to pick the lock

As Mark's moving toward the door, Elero's going to inspect the statue, which looks like it was originally in this room, and see if there are any traps.  If not, he'll pick it up, to see if it elicits a reaction from Mark.  If so, he'll quickly put it back down.  Just trying to see if this statue is the being that's possessed him, or something.

 Mark will move quickly and silently into the shadows for a second then pop up behind Elero, "Do not touch things that are not yours. The master will be very unpleased." He says with a dead pan expression on his face but a slight malice in his tone. 

Elero gasps. "Fair enough," he says, putting the statue back where it belongs. "Can you tell me who the master is?"

Elero Religion check: 5

Elero is still in the dark about what might me afflicting Mark. Although it seems to have truly changed his personality.

"The Master tells me it is not time yet, but soon you both will know my great master." Mark then sleeks back into the shadows and moves to unlock the door. 

"No way that'll turn out badly for us," Elero mutters.

Mark attempts to unlock both locks. The first is quite a hard lock, the second seems almost impossible:

DC 15 Thieve's Tools: 18

DC 20 Thieve's Tools: 12

But Mark is still the master thief. The locks slide back, and you may simply open and walk through the door to the south.

Mark will go through the door.