[After a few moments, Tris is clearly finished.] The biggest problem is that testing it to make sure it works doesn't work on me- I don't need spells to see magic at all. [It's actually sort of the opposite, and her mind does flicker to the fact that the spells on her glasses are for dampening that sight.] Here. Look through the bottom of the glass at me and tell me if you see anything.

[There's a touch of almost barbed humor in her mind at that statement- she knows damn well what is going to happen.]