It's the effect of HIGHLY
(read: low chance of success) upgraded Colosseum weapons. Also, there are sub-classes of the new "2nd advancement" classes. However, only the names were revealed of the sub-classes, and nothing more, unlike the new classes which got character art and skill previews. For example, there is an arrow that points to a ( ? ) from Straider (Blader 2nd advancement) and underneath the ( ? ) says "Blade Dancer (sub-class)". However, that is all that is revealed about the sub-classes from this preview. I'll post more of the sub-class names in a bit.
- The ( ? ) I'm talking about is this:
I added the translation underneath it.