Originally Posted by FatalityByLlama
I have to disagree... it's just like Lux's (or zyra's, or anyone's) ult: You have to finish the initial cast for it to do it's thing. If you didn't finish casting it, then it's canceled and your ult just got interrupted (and used). On the other hand, if you die once it's already out, then yea... it keeps doing it's thing (like zyra or as nami currently does).
Uhh, you clearly don't know **** about either Lux OR
Zyra, considering both of their ults have delays, but, one cast, they are effectively already fired, and will proceed to complete their awesomeness even if the person who used them dies
. It's pretty damn obvious that an ability shouldn't go on CD if it is never used. (This of course, does not include untargetability dodges, the ult in that case was still used, it just missed.)
I can't even begin to tell you how many times I have killed Lux mid-ult as Cassiopeia only to have the damn thing fire from her flying corpse and finish me off.