[quote=darkwolf687]
So... How does it work? XD Detecting mass is all well and good, but how does it detect the mass?
[/quote]

Still working on that. The sense is based off of a series called "Trilisk _____", which you can, at the very least, find on the Amazon bookstore.

I'm thinking maybe like an advanced form of electrolocation, like what sharks do except a thousand times stronger. Dunno yet.