Here is a summary of the Special Rules used by Knights of the Stormrider, all of these rules are also listed in the Codex areas and unit listings where necessary. Please note also that I am waiting on Codex: Demonhunters before I decide this army is in any way totally complete, being a force so bent on the destruction of Chaos, it is safe to assume that there will be Inquisitors and probably Grey Knights included in this list and replacing a unit or 2, but I digress...

Supreme Commander: A Knights of the Stormrider army over 500 points MUST be lead by the Stormrider. His stats are the same as any Force Commander. His weapons choice will always be a Storm Bolter, plus either a Thunder Hammer or a single Lightning Claw.

Command Squad: The Stormrider is almost always accompanied by a Command Squad, known as Purifier Guardsmen. This squad may consist of a Standard Bearer, Techmarine and Apothecary. In addition to these may Purifyer Guardsmen as listed in the HQ section. All members of the command squad will be armed with a storm bolter at all times, in addition to one other weapon. Purifiers will usually arm themselves with a power weapon as well, usually a powersword or poweraxe, and traditionally lightning claws for the Purifier. Purifiers are deadly killing machines, they are more than able to wield a storm bolter in one hand (even though it is thought of as a 2-handed weapon) and a second weapon in their other hand. However, they do not get +1 attack from having 2 weapons, since a storm bolter is not a close combat weapon.

The Purifiers: Purifier is the title given to the elite soldiers. It is the greatest and most honored position among the Knights, and among the Purifiers, great and powerful leaders arise. Thus, all Veteran Sergeants are given the title of Purifier Lord respectively. They still function as a normal veteran sergeant would as far as gameplay is concerned, however they will always arm themselves with a Stormbolter and power weapon, unless they opt to take a Narthecium or Servo-Arm (see below).

Special Armory: The Knights of the Stormrider prefer weapons to go along with the "Storm" theme in their name. The following weapons are the weapons that characters and Purifiers will usually equip themselves with:

Storm Bolters, Lightning Claws, Thunder Hammers, Storm Shields, Cyclone Missile Launchers (Terminators only). In addition to this, the Land Raider variants they choose are the "Crusader", due to the Hurricane Bolters it wields.

Preservation: There are not many Knights. They have been isolated within the Eye of Terror for what seemed like decades to them, though to the rest of the galaxy, centuries passed. Without a way to easily replenish their numbers as other chapters might be able to, the Knights were forced to maintain their numbers by just keeping themselves alive, repairing their broken bodies and machines. Many marines now have bionic limbs hidden under their power armor, appendages lost in battle many years before. Many marines also act as field medics or repair technicians to fix even the worst of problems, right there in the thick of battle.

To represent this, all Purifier Lords leading a squad may choose to arm themselves as the rest of the squad is armed (ie: a normal bolter for tactical marines) and choose either an Apothecary’s Narthecium or a Techmarine’s Servo-arm, and use them in battle as any Apothecary or Techmarine would.

Ultimate Sacrifice: The Knights are devout and fanatical followers of their leader, the Stormrider. The greatest honor held among them is to give their life protecting him. Therefore, any wound the Stormrider should receive must be passed off on any marine model (not a vehicle) within 2”, characters and sergeants included. This sacrificial marine does not have to be in the same squad as the Stormrider, just within the 2” range. Should the Stormrider take a wound, this marine will receive it instead. No model may have more than one wound allocated to it in the same shooting phase. If this sacrificial marine should live, he will be placed in base to base contact with The Stormrider and the following turn will have to get back in normal squad coherency if he had moved out of it. This model will count as moving even if the rest of the squad hasn’t (for purposes of rapid fire, etc). Marines cannot make this Ultimate Sacrifice if the Stormrider is attacked with a special psychic power that targets him directly (such as Mind War) or if he is hit by a template attack. Of course, if there is no one close enough to the Stormrider, then he will be wounded as normal.

Inspiration Against Bitter Enemies: The Knights of the Stormrider despise all things chaos, and their leader inspires them to great feats of glory and valor when fighting their worst of enemies. In any battle against the forces of Chaos, all Knights receive a +1 to their Leadership rating. Should the Stormrider fall in battle, all Knights will fight at –1 leadership for the remainder of the game, no matter who they are fighting.

The Grand Alliance: Over the years, the Knights and Ulthwe Eldar have formed a grand alliance against the forces of chaos on and around their home planet. If the Knights are battling on their home planet of Alurzia, the army may include ONLY 1 Eldar guardian squad as a single elite choice. This squad will have the same stats as what is listed in Codex: Eldar. They may be Defender Guardians or Storm Guardians. This squad may be lead by a warlock, even though there will be no Farseer in the army.