A Mage Breakthrough
The word "breakthrough" for a Pagna warrior and a mage meant two different things. For a warrior, it was when one was stuck at a stage and needed to do something different than they normally would to go onto the next stage.
The most common times one would be stuck in their cultivation were through the different stages: Initial, Middle, and Divine.
However, every person was different, meaning the times when they would need to break through might be more often compared to others.
For a mage, a breakthrough wasn't a spell; it was more so a type of technique, something that only a few mages could do and had managed to achieve.
A breakthrough allowed one to activate all of the magic in their core around their heart. The core would essentially break in that moment, exploding magic all over the body.