Drone Trap CR 5
Type magical; Perception DC 29; Disable Device DC 29
Trigger proximity; Reset none
Effect 1d3 Con damage plus 1 bleed damage (DC 16 Fortitude negates)
Hidden in the backways and alleys of the Three Sisters, a drone trap drains blood from unsuspecting victims, filling up a hidden container. The blood lost from the bleed damage seemingly vaporizes, but it is collected in full inside the container until the bleed damage stops, at which point it is magically teleported to parts unknown.
The vampires in Mohkba placed numerous drone traps in the slums of Klavekian towns in order to supplement their food supply and though the undead are ostensibly gone, their contraptions remain. Since a drone trap is usually placed in an area populated by beggars, street urchins, and other undesirables, the collection of blood (even if it results in a few deaths) generally goes unnoticed.