NOOOOOOOOOOOOOOOOOOOOO! I just came back to the game and without the wiki, I have no idea where I left off with my character or where to begin with new ones. I have no idea how to go about gearing my 40's now. >_< So saaaaaaaaaad!
Yes, it's in the description. It's covered under the power of extra magical damage upon crits that can only occur twice every six seconds. The black lightning is that extra magical damage occurring.
First, paragraphs are your friend. People have short enough attention spans that they typically won't bother to read more than a paragraph or two, but they certainly hate walls of text. As to what I think, yes. I think an addition of a water set would be pretty interesting. I always thought it'd be a hybrid dps/healing…