Reimian Empire

/Well, here. Let's do it one more time, just to be sure, although it's getting a bit absurd./
Shimizu approaches one of the inner doors and strikes it once with the katana from the late Ayame. He hits the area where there might have been a loop or some kind of lock.

Let Tsukiko shove stones into the dragon's mouth with a naginata. There are exactly four holes there.

Okay, he does it.