Many South American myths from a variety of cultures include one or more serpents. Some mythical versions of these legendary beings describe supernatural entities that can move to and from the land of spirits. Other versions describe two-headed, ravenous monsters.
Unfortunately for several contiguous South American countries running up and down the Andes Mountain range, Katari is more like the latter version. Bequeathed with supernatural abilities after the Crash, a normal boa constrictor was transformed into a two-headed creature at least 70 feet (21 m) long. Luckily, it only hunts once every few months. But when it does, it needs several cattle-sized (or person-sized) meals to placate its outsized metabolic requirements.
A small "Katari Cult" has sprung up. These cultists believe the being is a manifestation of an ancient sacred spirit, and do what they can to keep it hidden, even though it sometimes eats members of the cult.
Motive: Hungers for flesh
Environment: Alone, or in the company of two to ten Katari cultists
Health: 100
Damage Inflicted: Major wound (15 points)
Armor: 2
Movement: Long
Modifications: Speed defense as level 5 due to size
Combat: The Katari can attack two foes on its turn, once with each car-sized head. Targets that are
killed (or at least unconscious) are swallowed and slowly digested. Alternatively, the creature can whip its long body around, attacking all creatures it chooses within short range. On a failed Speed defense roll, targets in the area take damage and are knocked prone.
Interaction: Katari is effectively a boa constrictor, but one that has grown beyond all comprehension. Those with some ability to interact with such creatures (including its cultists) sometimes garner some influence over it.
Use: The PCs hear about a small town destroyed by a "monster two-headed snake" that is terrorizing a series of South American villages.
Katari cultist: level 2
GM Intrusion (Group): With a horrific popping noise, Katari spawns a third functional head.