Doomrider

The Daemon Prince known as Doomrider is one of the strangest servants of the Chaos God Slaanesh. His true identity has been lost to time, all that is known is that he once was an Astartes biker, supposedly from the Emperor's Children Legion. Granted Daemonhood by Slaanesh, Doomrider now eternally rides on through both the Materium and Immaterium, ever in search for more sensations. His love of speed would put an Ork Speed Freek to shame, and it is only equaled by his love of bringing agonizing death to the denizens of the Materium. Servants of Slaanesh often attempt to call him forth from the Warp to assist them in battle, but even when they succeed in attracting the Daemon Prince's attention, the vain an fickle Doomrider often quickly disappear back in the Warp toward the next happenstance that has caught his attention.

The Ordo Malleus has identified and translated the following refrain from the blasphemous Dark Tongue, who serves as the core chant of any ritual attempting to summon Doomrider:

Oh great Lord Slaanesh, send forth your servant, the Daemon Prince Doomrider!

Let our enemies tremble in ruptured awe before his fearsome visage!

Grant them an exquisite death, crushed beneath the flaming wheels of his chromium steed!

Permit them the ecstasy of being slaughtered by Doomrider's throbbing Daemonsword and his pulsating gun of gushing plasma!

Bestow on them one fleeting moment of pleasure as they stare in wonder and orgasmic delight at one of your most divine creations before dying at his hand!

Oh great Lord Slaanesh, for these reasons and many others that tease and titillate our imaginations, we beseech you, send forth your servant, the Daemon Prince Doomrider!

Appearance
Unlike most other Daemon Princes who adopt an appearance pleasing to their patron God, Doomrider still ressemble the Space Marine he once was. He appears like a corrupted Astartes with deathly pale skin and a crown of living flames for hair, wielding a gigantic sword, mounted on a corrupted Assault Bike adorned and festooned with blasphemous symbols and spikes. The truth is that weapon, rider and bike are one and the same entity, and indissociable. Speeding forward on a trail of flames, Doomrider can use the power of the Immaterium to challenge gravity, leaping above obstacles or remaining aloft like a Jetbike. The ancient Bolters of the bike now spew bolts of pure Warp energy, which have the destructive power of a Meltagun, and his Warp-empowered blade can cleave through the most resilient armour with contemptuous ease..