"Hmm." Sephiroth, for one, appreciates Harrow's lectures on her powers, because they really are fascinating. To be able not only to create this thing, but to imbue it with some degree of low-level sentience...

It's an entirely novel sort of magic, and he can appreciate its utility without feeling envious. Why would he want something else to do his fighting for him?

He unsheathes the machete again and draws it into a high stance. "Then by all means, direct it to defeat me, if it can." His gaze flicks aside to Gideon and he adds, rather graciously, "Or us, if you like." While he doesn't need the assistance, this is one instance where he can actually understand: it's no fun being left out.