"Call!"
"Begin Interference (Play Ball)! Ahaha Luvia, there's no need to get so excited!"
As Flat mixed incantations into his speech, the conflict between him and Luvia continued to escalate.
Being the private room of a Lord, it had a reasonably solid mystical security, and Flat was already specialized in receiving enemy magecraft without harm, so nothing had been destroyed yet, but...if someone with the same nature as Luvia became her opponent, I wouldn't be surprised to see a classroom or a lecture hall or two destroyed.
Case Files III, Epilogue