*hits a buzzer*
_ _ E _ U L S A | A | F _ _ E L L U M
incorrect guesses: R,B,T,C,P,V,D,N,G,H
left: 0
Well, admittedly, this might have been too hard after all. I've always puzzled at riddles others posted while mine were always very easy so I wanted to post something hard for a change. The solution is JOEKULSA|A|FJOELLUM which happens to be a river in Iceland

Well, it was interacting with the lava of Bardarbunga volcano for a long time so the name kinda got stuck in my brain.
Anyway, I shall create something easier this time, don't worry.

_ _ _ _ | _ _ _ _
incorrect guesses:
left: 10