Daemons are entities of the Warp, and servants of the gods of Chaos and some of the most dangerous entities in the galaxy. They are created at the whim of a Chaos god from a fraction of the god’s own power and act as an extension of their will. A daemon’s appearance and character reflect the god’s own nature. These daemons may be reabsorbed into the god at whim
Being an entity of the Warp (a dimension of the immaterial) a daemon cannot exist for long periods of time in realspace, any more than a mortal can survive unprotected in warp space. There are a few ways a daemon can breach the walls separating warp from real space and gain entry into the mortal universe. Daemons can be fought in a physical sense whilst in realspace but are rarely killed, more frequently they are banished back into the warp to fester and brood until their next chance into realspace presents itself. Only when the fabric of reality frays or even tears can daemons exisit in the mortal world. This can be done if a planet is shrouded in warp storms or on a single battlefield with power incantations and sacrifices to whatever dark god the deamon serves.
Instead of being summoned into real space, a daemon may enter the mind of a mortal (the mind of a psyker is the most susceptible to this), and turn the individual to its will and, through its host, affect reality. Some heretics offer themselves as hosts through daemonic pacts such as the Possessed Chaos Space Marines. While the host is considerably stronger as it is powered by the deamon if the host’s body is destroyed or exorcised than the deamon returns to the warp. Few people possesed by daemons survive the process but those that do have shared minds with a daemon and are privy to all of it’s secrets and knowledge, this can result in madness but has in famous stories, been used to the advantage of the Inquisition
TYPES OF DEAMONS (from greatest to least)
THE DEAMON PRINCE
The followers of Chaos try to gain the attention of their gods in order to gain terrible power and great rewards. Those striving in the way of their god are known as Chaos Champions, whose ultimate, driving goal is to transcend mortality by becoming a Daemon Prince. Those who become Daemon Princes are counted among the most powerful creatures of Chaos, second only to the Chaos Gods themselves. However this path can as easily lead to another extreme. Throughout the path to power the Champion undergoes constant change, until either the god judges him worthy of Daemonic ascension or his form finally is overcome by the accumulated mutations and he descends into a mindless Chaos Spawn.
Only the greatest of Chaos servants can ever hope to even be considered a Daemon Prince, and should one be encountered on the battle field it would take the Mightiest of armies to defeat even one, as even Living Saints have struggled to defeat them.
Greater Daemons are the most powerful of the Chaos Gods’ servants. They act as wardens of their patron’s realm and have authority over the lesser Daemons of their respective God. It is often they who lead Daemonic Incursions.
Such is their might that they cannot simply be summoned like Lesser Daemons. A greater Daemon needs to possess a living body in order to manifest itself.
Greater Daemon of Khorne: Bloodthirster
Greater Daemon of Nurgle: Great Unclean One
Greater Daemon of Slaanesh: Keeper of Secrets
Greater Daemon of Tzeentch: Lord of Change
They are the foot soldiers of Chaos, building the core of the Daemonic Legions. They are usually anthropomorphic in appearance and possess a calculating, malevolent intellect. Among the Daemons of Chaos they are ones most likely to answer the call of mortal heretics and be seen in the real world.
Lesser Daemon of Khorne: Bloodletter
Lesser Daemons of Nurgle: Plaguebearer, Nurgling
Lesser Daemon of Slaanesh: Daemonette
Lesser Daemons of Tzeentch: Pink and Blue Horror, Flamer
Daemonic Beasts are driven by a feral intellect and commonly used as hunting beasts by Chaos forces. Possessing the least intelligence of daemons and enter the mortal world in droves. Some are even used as mounts.
Beast of Khorne: Flesh Hound
Beast of Nurgle: Beast of Nurgle & Battle Fly
Beast of Slaanesh: Fiend
Beast of Tzeentch: Screamer