Shouldn't Ciri be unable to use ANY magic aside from Elder Blood powers?

In the trailer we see her not only user witcher signs but also what I'm pretty sure is just regular magic. At one point she draws energy from water to use a spell on the monster, right? I mean, that's what she does?

I'm pretty sure she can't do either of those and I don't see how going through the trials to become a full witcher would giver her access to magic again since she completely lost connection to it.