[It just makes sense, for this to be grown from their bond more than Casey's brush with the other fae here. Rue doesn't even give that a thought, he was never with them for long enough for anything to really happen. So it must be something beautiful and significant instead.]

Any chance I have at contributing to your happiness is so special to me, Casey. I'm so glad.

[That the two of them could do this for Casey is especially precious to them.]

As it manifests fully, I imagine it will remain this single spell, if it's the only one you've been able to cast so far. Enough fae magic for that one ability, but what a useful one! If you would like help gaining control of it, you need only ask. I have similar spells, so I'd be happy to help you get it under control, so you aren't teleporting all over all of the time.