[It settles over him - along with the instant recognition of what spell would correspond with the sudden surge of power within his brand - and Hope's eyes widen slightly, gaze instinctively dropping to the eye on his wrist before he brings his hands up.]

You can do that, too?

[He's hesitant to actually cast offensive magic in Lightning's direction, nervous of how her ability to mitigate it would extend here—and though it's unbidden, the first thing his memory conjures up is that horrible image he witnessed over the journal. That involved magic, too, even if it was different from this.

So instead, after a crack of the wrist, he'll be sending a blast of thunder where it won't harm anyone: straight over the lake. With the boost, he'll find that it doesn't bring his skill entirely back up to speed with how it was before he arrived here... but there's a definite marked change.]

I think it works. I don't know if casting it at you is a good idea or not... can you use Shell, too?