It was a simple thing, since everything she was looking at is mana then shouldn't she be able to control it? The problem is that she didn't have that kind of power to control external mana.
Since she can only control mana from inside then she let Carel get close to her before she sprayed what came out like a blast mist of blue mana.
Carel entered the mist as it it was nothing and indeed it was, only that it still has her internal mana and she have control over that.
"Pause." Litha said and the mana mist trembled, Carel's form was condensed and froze for two seconds but that was enough because that was when a blast of hot mana take his head off like a spoilt watermelon.
