I nearly voted for "other" just because of your comment but idk if it strikes me as frightening per se, but it definitely strikes me as something, it is so wonderfully deranged indeed.

To me it comes across as frightening because it's so deranged and divorced from reality - we knew that about him already, and yet in this moment it's worse, with ZYL sitting there furious and grieving while YZ thinks he can talk him around???

Does it mean he never has to wash any clothes? It's so practical and time-saving. xD

Right? That would be a fantastic power to have.