How to access ancient oma cave??

[Neptune]

how is it I access this cave. I have been to the stone on floor 3 but not sure how to unlock it. I thought it might of given a quest for it??

 

[Wittin]

Hey, it's a level restriction only. 22-30 are the allowed levels for that one

 

[Neptune]

Ah, thought I was missing something. Thank you. Thought it was from 15+ thought I was going crazy lol