The source of the power for Borderlines and all the rest of your magic. [He's watching her pass the half way mark and doesn't want to distract her too much.] When you're casting a Borderline, just feel where the power is coming from and follow it back. The point where it comes from is the Name. That source is what you want to be drawing on in vessel form to activate your own power.

[Not that she'll necessarily be able to use it. Divine powers are for the gods. Shinki vessel powers are... for the gods, and sometimes even control of that power is taken from a shinki. Leaving them just the prism in which a god's life force is filtered through... just like how the Rend spell isn't actually a god and shinki working together, but rather a god using a shinki as a conduit. An unfair exchange in every way.]

Your god can also help by drawing on that same connection. Sometimes it really takes both parties to get things going sometimes.