ok so i talked with the statue it says island to the north the journal says small island near dagon fel i looked on all islands where is this daedric evidence at? some help please

Here is the location but check the FDL for a picture. Southeastern peninsula on which Nchurdamz is located. From there go southeast to the coast or go east to the coast and follow the coast south you shouldnt miss it its pretty big.

the island is literally north west of Dagon Fel...kill all daedra on the island and make sure you take the ring from the named golden saint..Staada...that is the evidence you need to take back to Azura's shrine in order to get Azura's star

also make sure you don't step foot in the shack or you mess up the quest

Aww, now im made,my quest for all grand souls has failed. Staada, i killed her without even knowing it........... well i could just make it the quest for all dagoth souls.

is the only soul that has constant efect a golden saint or is there another way to get it, such as capturing vivec in azuras star

how does azuras star work, is that you use the same soul over and over again or is it that you have to trap a new soul each time you use it

Azura's Star captures one soul at a time but is reusable unlike other soulgems, in other words it goes back into your inventory empty after it's used

as for constant effect, only golden saints and ascended sleepers have constant effect, they can only be caught in Azura's star and grand soul gems