Agatha lacks mana. Issac drained his mana to trigger the accelerated return of all of Agatha's mana. For the humans in this world, Mana was an important thing. If a person ran out of mana and wasn't dealt with immediately, there was an 80 per cent chance that person would die.
At first, he just wanted to trigger it. But because it was already done, Issac made Agatha's mana full again. Her pale skin was starting to return to normal. Her body heating up had also returned to its normal temperature. Slowly, Agatha opened her eyes.
"I-issac! why am i here!? what happen with me!?"
"Ah. you really don't remember? we were sparring and you lost because you ran out of mana and passed out. drink this. This is an energy drink. all your energy will immediately return if you drink it."
Agatha didn't look convinced. But she still forced herself to drink. It turns out Isaac was right! Power back to normal. Even fresher and stronger than before.
