User blog comment:Mineko Charat Lucky/League and the Institute has nothing to do with League of Legends anymore(?)/@comment-7782121-20130815070803/@comment-7782121-20130815111634

Absolutely correct that Lucian has a more personal reason not to delay his vengeance. The League's protection of its champions is considerable but not entirely absolute, given the clashes that have sprung up here and there. First Kassadin-Malzahar, then later on with the many, many, many brawls between Demacia and Noxus.

Also, if we're talking death-immunity, the only precedent I have is the departed and mourned Urf the Manatee, who was killed en route to officially join the roster. Whether this means champions can indeed be ganked 'for good' is up for debate, since Urf was not technically a champion yet. XD