He was a Jedi Master on the High Council during the Clone Wars, a good friend of Obi-Wan, and the one to discover Ahsoka Tano. The ability you're talking about is basically a Jedi version of force lightning called electric judgement. Many Jedi were wary of him because of his usage of that skill. I don't know if it's canon though.
Well I'm pretty sure invisibility for Darth Maul and stealth healers isn't cannon either xD. I see no reason why electric judgement can't replace pebble throw and make the game balanced.