Re: Horsemen of the Apocalypse 3 - OOC
No, not really. There are a lot of abilities in the game mask the presence of abilities, and that's what makes it difficult. For example, Mika could steal someone's aura, mask both her psionic and magical abilities (even from Psi-Stalkers) and change appearance to whoever she wants, and with Mind Block you won't be invading her mind either.
Given she's a bit of an extreme case, but we're dealing with some potentially extreme guys.
The only aspect I do not believe you can mask is your status as a Supernatural or Magical creature. So if something can sense the presence of a supernatural or magical creature then there's no real way to hide that. Hence why Mika can make herself look like anyone but Dog Boys and Psi-Stalkers would still identify her as supernatural. Plus we're all, besides Jess, supernatural so takes us back to stage one.
A simple metamorph spell does not convey a different voice, you speak in your normal one, but I think there may be spells around that. Plus our shape changing nemesis has already proven that it can mimic other's voices.
The idea of imprinting an object/item to a person would be a cool idea, if we had the time and know-how to do it. Say something specifically designed to react in a particular way when it encounters another with a similar device, sort of like the Witcher amulets or the Highlander sense. There's pitfalls with the idea of a magical IFF system, but it could be quick and subtle enough to avoid being stolen or reverse engineered, at least until we've left Africa I should hope.