Abyss: This skill is abit tricky to use if you don't know how to use it but is one of the most powerful damaging skill especially against bosses.
This is a bit like "this skill is good if you know how to use it, no one should mention how this skill is used". I tried it several times last night, I googled and so on and I still cant figure out how to trigger it or how am I supposed to cast it. Any hints?