She doesn't have introspective access to - !
"Are you saying you just got a bunch of new high-ranked Skills and you don't know how they work?" This explains something about the size of craters left behind when Summoned Heroes fight things. "Stop trying things!"
Unfortunately, Haroun also speaks this language fluently and idiomatically. The way in which he says "stop trying things" is by using an idiom based on a historical reference that will sound to Bella vaguely like "Darmok and Jalad at Tanagra" which carries an undertone of "don't randomly try launch codes for nuclear weapons".