Question About the 4 Rooms of Qin-Shi Tomb

[majincooler]

I have been searching for some answers about the 4 Rooms in the Qin-Shi tomb, which are:

Those rooms are named, Courage, Test, Hero and Challenge.

The question is, how do I enter these rooms?

People said you can obtain "keys" to open the chests inside these rooms, but they did not mention which monsters drop them, and how do you enter these rooms in the first place, so you'd be able to open them!

Please clarify and thanks a bunch!

Peace!

[omier]

I remember some keys in stall network in ksro with those names. There was quite a big amount for sale. But i donät know how to get them.