Lightspeed

[Kayla]

Lightspeed is indeed not a spell you can react to, only predict.

Moreover, predicting it isn't as easy as some people noted. It all depends on how much pressure the lightspeed user is giving on the opponent until they crack and use a defensive to try and avoid an incoming attack they predict is going to come.

Quick edit: It may be needed to talk about QGCDE root moves too, since those will pin you down for a beam just like the gcde stuns.

The HUGE difference is that while rooted you have a lot of counterplays. You can react and press an invincibility, block, use assault or phantom etc. You can react to the sound of the whip with a bigger leeway. 

When it comes to water whip that fulls on stun you or other stuns like that once it hits its too late.