[quote=@Raineh Daze]
Not a GM, but doesn't that run into the same fundamental problem that any opposition that doesn't have super speed to constantly break line of sight or a hiding focus [i]won't[/i] be able to avoid or contest the end result in any way without significant metagaming?
[/quote]

Maybe I'm overestimating these Grudges, but I don't think it's that difficult to break line of sight in an urban environment and a total of nine seconds for the full effect to come into play is a long time in a fight; I don't think you need super speed at all. Even accounting for the fact that the Grudges wouldn't know to avoid the eyes at first, that's still nine seconds where Nao has to not get herself killed by the thing attacking her with no real method to defend herself and being attacked is probably going to force her to break line of sight herself anyway.

I just didn't want to do something a basic as "shoots fire and has eyes", but if a line-of-sight based power doesn't work then I'll come up with something else.