The Brood of Githonus

They have called from no where & through the voices of history itself. They are the brood of a planar demon & can be called at a moment's notice by a skilled astronaut at a moment's notice. It is known that one part of this group of  spectres  comes from the crew of  Damned Storm of the Seven Spaces. 
  The crew pledged their undying souls to the demon in exchange for eternal life. & they got it. 
From The Unholy Scriptures of Githonus : 
Lo did they promise their souls 
Lo did they receive their reward 
& Lo they are a part of  Githonus for ever more 

The planar demon sits in his micro cosmic hell waiting for those foolish enough to call upon his brood. For after 7 times you call upon them your soul is his & you shall join their ranks.
The Brood of  Githonus
No. Enc.: 1d8
Alignment: Inimical
Move: 120'(40’)
Armor Class: 6
Hit Dice: 3
Attacks: 1
Damage: 1d8 (plus special)
Morale: 12
The brood appear as a cloud of blue green negative energy the sends chills down the very souls of those they are sent to attack they do so relentlessly. They tear any vitals they can get a hold of ears & eyes being especially favorites. None are sure what happens to those but many believe they are savored like candy for their master himself. They often attack with weapons from the era from which they came. The brood will begin to regenerate after a few rounds until they are back to full hit points. Their wounds that they make can only be healed with super science because of the contamination of negative planar forces.
They have been know to use what has been called their Gap. A character must save vs when he meets the gaze of one of these creatures or begin to lose a level. This attack enables the Brood member to become solid for a few hours on 1d4 roll. Fire, plasma, or the prayers of certain astronaut cults have been known to drive these monsters back. They can not cross planar barriers at all.