Well, let the guy be aware of this too... Otherwise, if I'm the only one not masking, it'll be some kind of a mess.
And is he on the spider?
On the spider. And I remembered that the spider doesn't disappear during invisibility. So after all, he won't be able to respond to your invisibility with his own invisibility while the spider is alive. But if the spider dies, then see above...
Ничто не возникает из ничего и ничто не пропадает бесследно.
Если где-то чего-то убудет, то в другом месте добавится.
(Закон сохранения).