Responses
Not really. It's a thing in warriors in the fictional world (or maybe irl idk) but it's somewhat similar to being in the 'zone' or something with people in sports. It's a physical state a person can be in where they feel like their going past their limits. In this case (story), I think the author portrayed it more 'seen' with their sword shining, like you see when their sword glimmer covered with the wielder's energy or 'aura' as they call it.
There is something that I don't understand..If Perez and others knights can master the AURA then "magic" exist in this world?