stilshrine of miriam hidden area

[Highlulu]

i know that there is some hidden area in ward of the sword king... but i can't figure out how to get into it. ; ;

i just want to get some sagitarius gems...

[Mysterio]

did you kill the first demon wall?

pretty sure thats the one you're after, I think the only other unexplored spot first time through is the Zeromus esper fight, which you will be able to do after Mt Bur-Omisace

[StaplerGuy]

Push against the RIGHT (as viewed from the waystone you enter the room from) wall, after the T-bar with the save point, on the way down to the statue that raises its sword. The wall will become transparent and disappear, leaving stairs. Two rooms there, first staircase (best for oilings), second a room (4x oilings, one sometimes is Matriarch Bomb, chest with 50% shot at Shell Shield, but cast Float before entering because you enter the room on a zerk+confuse trap)

EDIT: I had left. My bad.