"No, you'll have the arm. I think it's only fair that we finish your arm before I drag you off on another adventure. But the ability will be built into the arm. And it's not quite the same kind of invisible you imagine."
She shifts a little, getting more comfortable for the explanation. "See, the dangerous thing about the Thern artifacts is that they give an impression to the mind. The mind itself fills in the gaps, leaving a flawless illusion in place of an infiltrator. The device doesn't actually make light bend around you. It makes the person who is looking at you think you're supposed to be there, and that you're of no consequence whatsoever. You're scenery, essentially. I can do a full cloak; we use that for stealth operations. But in this instance, you need to worry about people bumping into you. And that's a lot easier to avoid if they can see there's a body occupying the space they're about to walk through."
no subject
She shifts a little, getting more comfortable for the explanation. "See, the dangerous thing about the Thern artifacts is that they give an impression to the mind. The mind itself fills in the gaps, leaving a flawless illusion in place of an infiltrator. The device doesn't actually make light bend around you. It makes the person who is looking at you think you're supposed to be there, and that you're of no consequence whatsoever. You're scenery, essentially. I can do a full cloak; we use that for stealth operations. But in this instance, you need to worry about people bumping into you. And that's a lot easier to avoid if they can see there's a body occupying the space they're about to walk through."