Is this translation right? It doesn't really make sense, but it's the most sensible thing the dictionary brings up for すべらない.

[統べる (すべる) (v1,vt) to control; to supervise;] seems like a better option.

Nothing a little research can't fix.

葉月 said:
[統べる (すべる) (v1,vt) to control; to supervise;] seems like a better option.

That's an ichidan verb. I'd like to see you conjugate a "suberanai" out of it. ;)

But can she make her saving throw?

If Yuki can bless a baseball bat, she can certainly hack the dice.