Do Anyone Knows About This Chest? (quest: The Lost Key, Arach'n)

[VeroldEnder]

http://imgur.com/sOabqO6 where to find it?

 

[FireFan96]

Spoiler: For those who haven't done it yet

You know that area with the two skeletons spam shooting you right before the final tunnel to Arach'n?
Theres a door on the left side in that room with the skeletons. The chest is there.

 

[VeroldEnder]

thanks you very much!! i've finally found it