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Durgan searches every inch of the room and leaves unsatisfied. He turns left and continues down the unexplored passageway, confident that it will end and that it probably leads to the entrance room.
Durgan checks the door for traps first, feeling confident that his guess was right.
D12: 1
"And here, the entrance room," He says as he swings the door open.
You open the door and see that your across from the door you went inside to further explore the old temple. To your left is the big double doors that mark the entrance to the temple and to your right stand the two huge doors that lead to someplace unknown for now.
Durgan's curiosity is piqued as to what the huge doors are secreting, but it is more reasonable to keep them closed. If they open too many pathways, they could get lost and too many adversaries might fight them.
So instead he decides to go across the room to the door they had already opened, follow the corridor, pass by the open rooms taking a quick glance into each and passing by the chest that should be in their path. When he reaches the intersection he leads towards the unexplored left path.
Out of Character: All the doors were on the right side, right?