Imposter's Heart

Give to McCabe at Ward 13 to craft the Deceit long gun.
Reward for defeating Faelin on Losomn.
Lore
One side pulses softly, the other at a rapid pace. One side holds warmth, the other an abyssal chill. The biological functioning of this organ is mystifying, but the enigma goes a long way toward explaining its previous owner's temperament.
"There is only one imposter king. Whatever their appearance may be, their cunning is the fruit of a single mind, and their pulse is that of a single heart—simultaneously black and deceptive."