Basically, it's not Zanoba who destroyed the artefact, but the two beatwomen in his class (the cat and the dog). What will happen (at least based on the WN and LN) is that Rudeus will challenge the two of them on a duel with Zanoba. The result is, as expected, the beastwomen losing horribly with Rudeus basically curbstomping them. They will be hauled to Rudeus' room Santa Claus kidnapper style and then be questioned thoroughly. The result is:
Now, to give some context: there is literally NOTHING more humiliating to a beastwoman than being tied up and be splashed by water (if you remember, this is exactly what the other beastwoman did to Rudeus during the kidnapping incident). He also woke them up with some water magic, BTW. Rudeus left them alone there, all tied up until he finishes classes the next day. When they find them, they're soaked in their own piss.