A single-shot injector weapon disguised as a standard medical auto-injector, the kind carried by millions of people in GLMZ for medication delivery, allergy response, and BCI maintenance. The Mercy looks, weighs, and functions identically to a Lazarus-manufactured medical device — because it is a medical device, with one modification. The injection mechanism can be loaded with any liquid payload, and the delivery needle has been lengthened and reinforced to penetrate through light clothing and reach major blood vessels.

Lazarus officially produces the Mercy for clandestine medical operations — field medics who need to administer emergency treatment to unwilling or unconscious patients in dangerous environments. The weapon's medical camouflage means it passes screening checkpoints, security inspections, and even casual physical searches, because every third person in GLMZ carries an auto-injector for legitimate medical reasons. Hiding a weapon in the most common object in a city is a form of genius that borders on cruelty.

The Mercy's payload determines its lethality. Loaded with a sedative, it puts the target to sleep. Loaded with a paralytic, it immobilizes them. Loaded with potassium chloride, it induces cardiac arrest that is nearly impossible to distinguish from natural heart failure. The weapon is the delivery system; the intent lives in the chemistry.