This is a very original and interesting idea. I am actually a fan of well-done OCs, so I'll be sure to watch this fic. There are several minor grammatical errors, but that's understandable. Very well written considering English is not your first language. Please continue to write.
I'm not a fan of OC-heavy FanFics. Especially when they create a rather large shift in the Source Material. Alec/Haven seem to come out of nowhere, though this may be explained more later on. Also Welneth seems a little too Deus Ex Machina.
I might have been a little hard on this story when I reviewed chapters 1-4. That being said, this chapter is mostly exposition and a conversation between to characters. I do like the reveal of Alec's intentions and such, but it feels like it should have come a little sooner, or at least have had a different setting. (Perhaps more confrontational?)