Xhar Morghuil's Tome • AQW Wiki Afianf

Though all mortals have an hourglass which measures the span of their lives, Death is eternal, and has no hourglass. But all mortals do, and Death currently inhabits a mortal form. Should the sand in the hourglass connected to that form run out, Death would die. As all must do, when the time allotted to them expires.

All of Death's hourglasses are stored in a hidden realm accessible only by Death himself or those sworn to his service. The sarcophagus in the heart of his realm holds whichever hourglass he desires at that moment, placed there by one of his daughters. They measure out the sand for each mortal, fill the hourglass to the desired lifespan, and keep track of which glass belongs to which human.

Not children of the body, but of the spirit. They are demi-immortals, called up from the aether plane to serve him. As long as they fulfill their functions satisfactorily, they will remain as they are. Should they fail, they will be replaced. But Death is fond of the current trio; they have been together for millennia.

Because he didn't have the guts. Duh!