Celtic Heroes

I need to kill corrupted unicorns to get my darkshadow armor and i’ve killed around 60-80 so far and have only gotten 1 corrupted unicorn horn .... what is the drop rate?

Unfortunately low. The way the quests are set up rely almost completely on RNG, rather than player dedication. I’d recommend trying to see if any other players have some for sale, though I think most players just sell them to the shop, not realizing that they are for a quest.

Don't worry too much about not finishing that armor set. You will out level it pretty quickly anyway. Concentrate more on getting your warden armor. I forget when those armor quests unlock but if you're in Stonevale then you should be getting close to it.

I am in stonevale but its going to be a while until i get those fragments