[quote=@Sep]
[@Double] I like it, just since Force Lightning is so often devoted to negative emotions and whatnot I'd like a little more detail on how he came to using this ability/trained in it.
[/quote]

I added the detail you asked about. Here's the excerpt so you don't have to reread the whole thing.

[quote]He traveled alongside Master Tharn for a time in order to train under him, even serving alongside him when the Clone Wars had started. One such excursion resulted in Vrex being trapped behind enemy lines after faulty communication lines prevented his next set of commands from reaching him. Surrounded by battle droids and uncertain that he could fight his way, Vrex's emotions got the better of him and he lashed out, using Force Lightning for the first time to take out the droids in nearly one fell swoop. When he reported to his Master, Tharn was glad Vrex made it out alive but also warned him not to rely on that power, saying that it could lead to the Dark Side. After this, Vrex decided he wanted to walk the path of a Jedi Sentinel, and devote his training to defending the very Temple he grew up in on Devaron, perhaps out of some form of penance for dipping his toe into the Dark Side, however brief it was.[/quote]