[Her smile falls a bit at the way he says that, because... yeah. She can understand it. Her own powers are like that, after all. And that just makes her think of how Anna gushed over her powers, despite how much Elsa struggled with controlling and mastering them.]
... I do know. Very well in fact. But... just how bad things get with your powers?
[video]
... I do know. Very well in fact. But... just how bad things get with your powers?