He was talking about how he was a Tsar. Maybe he added something extra to his title?
Added 3 minutes later
Maybe the problem is with the cat? Ivan the Terrible threw a hat at it, but I have some doubts that black cats were considered a bad omen in Russia at that time. I'm not even sure if they were around at all, although anything is possible...
Added 14 minutes later
In general, a black cat is a necessary attribute of a self-respecting witch, so the phrase "Begone, unclean spirit" could very well have been spoken.
Ничто не возникает из ничего и ничто не пропадает бесследно.
Если где-то чего-то убудет, то в другом месте добавится.
(Закон сохранения).