Chaos titans are powerful beings from other worlds or dimensions who derive pleasure and nourishment from strife and conflict. They are not gods. Thus, they cannot shape reality in the way that a true god has authority over a domain such as light, or love, or death. Nor do they exist outside the bounds or rules of the material universe. However, in most cases, practically speaking, they are immortal and invulnerable.
It is possible to destroy them, but the correct rituals to do so are difficult to obtain and may even have been truly lost. It is easier to banish or imprison them, but even such limited tasks are the work of a legendary hero. It is unknown whether chaos titans were created by mad gods, ancient sorcerers, or are birthed naturally from maelstroms of chaos.
Chaos titans can grant powers to mortal servants in the manner of divinities. They favor powers of destruction and awe. They are often the patron of rebels, and may pretend to be gods unconnected to chaos. They communicate only telepathically, at a range of several thousand feet. Thus, they often reside in caverns deep below populated areas, where they can cultivate followers, though they have also been known to hide in storm clouds, volcanoes, or powerful rivers. They enjoy causing natural disasters periodically.
The physical presence of a chaos titan may mutate creatures nearby, though this radius will vary from titan to titan and can be controlled to some degree. Chaos titans dislike any kind of stability, and are likely to betray followers if they feel like their power is being used in the service of order. They will also use their followers to undermine any other source of law. They have little sense of time of consciousness, and thus little ability to plan; they exist mostly in the moment.
When in physical form, chaos titans often appear as giant chitin-plated humanoids, 50 feet or more in height, but may take any form that pleases them of approximately the same size. Metamorphosis between forms takes one turn, and is terrifying to behold. Anyone witnessing such a transformation must succeed on a morale check or flee (this does not apply to PCs, but does apply to all retainers and NPCs).
AC as plate, HD 20, # attacks 2, damage 3d6, immune to non-magical damage, movement 24 (levitation). They may cast the following spells at will: ESP, confusion, invisibility, levitate, pyrotechnics, lightning bolt, transmute rock to mud, part water, all cure spells. They can also grant these spells to followers of the appropriate level that are within telepathy range. Individual titans may also have access to other spells; this list is merely a suggestion.
If defeated in combat without the proper destruction ritual being performed, the chaos titan will reform in 1d4 weeks, often growing in a surviving follower or nearby beast.