Power stones are bought or found in the dark dungeon dropped by the boss

Hello, could anyone explain me attributes? Inteligence, dexterity?

I accidently sold my first and only unique item, the Lightning Helm, is there any way i could get it back? i would really love an answer and if you need any more information about my account to know if i can get it back please tell me. Thanks in advance for the help.

es muy buena el juego , quisiera saber como puedo conseguir mas piedras rapidas

Sword

I’m at level 19 for my character and I can still only get tier 1-2 drops out of the equipment part of the shop, is there a solution to fix or change that?

the unique sets get to level 120 before stopping beyond that you need to use stones to level them up 

the limits of the unique items are 120 beyond that use stones to levl them up 

what does dexterity,and intelligence and all the other stats boost? because iv'e been trying to figure that stuff out for awhile now but still had no luck on it.

Guys somebody help me!!! How to acquire unique equipment????