The Grandmaster Demon, Jasper

The training session under Auris's guidance had become a grueling ordeal for Calista and her fellow female barbarians. The intensity and relentless pace had led to countless injuries, so numerous that they had lost count.

Each time they sustained damage, their only recourse was to channel their mana, weaving it into their very being to mend their wounds.

This relentless cycle of injury and recovery was brutal, yet it served a hidden purpose. With every hurt that was healed, their bodies adapted, their flesh toughening.

This process of being repeatedly wounded and healed was inadvertently refining their resilience, forging their bodies into something stronger with each cycle. 

In an unexpected turn, Auris abruptly halted the training session. With a mere gesture, he caused all the icy training implements to vanish, instantly transforming the intense atmosphere into one of calm.