Ellsee: Examine cloak.
A handy disguise that keeps your identity somewhat hidden when you're out and about. You don't want to think of what would happen if you were to fall on THE WRONG HANDS.
Your blood is an abnormal source of BOUNDLESS VITALITY, and that is no secret to the world at large. Who knows what ill-intentioned actors would do to you, in order to gain access to this power? Who knows what they'd do with it?
There is only ONE PERSON on the planet who you trust to handle this sort of thing with good will. Which is why you've been supplying him with a regular share of samples for sweeps, now.
You just wish he'd message you more often.