I figured as much. Which is why I agree, heroics are best avoided.

[After she takes a moment to breathe and rest her hands on her knees, she keeps following him. Her stomach is calming down a least a little. So hopefully he's safe from the splash zone.]

It does here. Usually it only happens when you exert an extreme amount of mana. But here's like everything's cut in half. Less than half. Even simple spells can be exhausting.