Board Thread:Speculation House/@comment-190.47.114.141-20170910035917/@comment-25396609-20171011153857

I think whether we see a flash of aura is based entirely on how much damage it takes. Think of it like a ripple on still water. Dropping a pebble into a lake causes almost none; but doing a canonball into it creates not only ripples, but a rather substantial splash.

For most attacks, for example being shot by a small bullet, it's possible the aura only flares up on the point of contact. The larger ripples we see when Tyrian is attacking Ruby may be a result of him using his full and unrestrained strength in order to take her down quickly; paired with her relative inexperience and potentially weaker aura.