40K Source

(To explain these rules I'll call him Typheron)

He must be used exactly as described below, and may not be giving additional equipment. Can only be used in a battle where
both players have agreed to use special characters and the army is over 1500 points.

Cost: 155 points

WS:5 BS:5 S:4 T:4 W:2 I:5 A:3 LD:9 SV:3+

Wargear:
(As you said) Blood Sword (we'll call it for now), Jump Pack, Master-Crafted Bolt Pistol (instead of a Storm Bolter) Frag
and Melta-Bombs.

Blood Sword:
This ancient weapon, though beautifuly crafted and semmingly innocent, shines like newly spilled blood and glows an erie red
as if it were possesed by a deamon. It calls out to its weilder with an intoxicating song of blood lust and raw power.

This sword is treated as a power weapon which adds +1 to Typheron's strength when used against a Psyker or Deamon. It also
makes the wielder go mad with bloodlust in combat. As a result Typheron will succumb to the Black Rage on a roll of 1 on the
first turn and a +1 on every turn after (ex. 1-2 the 2nd turn, 1-3 the 3rd and so on). This can not go up to 1-6 on a D6)
When this happens after the 2nd turn the Death Company and Chaplin must follow suit at the cost of -1 attack to each model
(It's hard to keep up with him when he succumbs to the Black Rage).

Fearless:
Automatically passes any Leadership tests required to take. Even those against psychic powers.

Ignore Injury:
On a 4+ the injury is ignored and the model continues fighting. Except from double toughness weapons and weapons that allow
no save.

Maddening Battle Cry:
Although he never talks to his breathern on or off the field of battle, Typheron goes into an unrelentless battle frenzy and
howls like a mad man when in hand to hand combat. As a result any enemy unit that looses in hand to hand combat with
Typheron suffers a -1 modifier to thier Leadership for a morale check.

Death Company:
If Typheron is used in a battle he must join the Death Company and the Chaplin and Death Company MUST be equipped with Jump
Packs. He also counts as a HQ choice.

thus Typheron was born.

Fearless? No leadership tests? Darn you, he's invincible :P