Arjuna can step through time.

Technically speaking it wasn't actually an action related to magecraft, but Touko was willing to let it slide because of how utterly insane your biology was and how much of it might as well be magic. And you made some pretty insane progress with improving it anyways! (Can now step backwards/forwards through time up to a full minute every hour, and massively speed up/slow down your own temporal movement with moderate ease!)