Monster Monday 

Deep Star Spawn

Frequency           Very Rare
Habitat                 Spaces between worlds unless summoned
No. Appearing          1
In Lair                     0%
Move                      Fly 24" Maneuverability class B , Swim 40" crawl 6"
Hit Dice                  12
Armor Class             0
No. of Attacks         12 (tentacles) 1 Bite
Damage Attack        1-4 tentacle (grabs target on any roll of 19+) , 6-30 Bite
Special Attacks       Hypnotic Gaze , Swallow Attack on round after a target has been caught
Special Defense      Spell Devouring - any magic spell cast upon them heals them 2 HP per spell level
Alignment              Chaotic Neutral
Intelligence            Average to Very
Psionic Ability        None
Exp Value               12,500 +10 per HP

Deep Star Spawn are beasties that live between the spheres in SpellJammer universe , that tend to orbit near those spheres that are rich in magic. They have 60 foot long tentacles which they use to ensnare their prey , on any roll of 19 or greater they have ensnared the foe as a rope of entanglement and take 15 hit points each to destroy, and once every round may attempt to devour a single grabbed foe. They live on life energy and magic , and are drawn to powerful lifeforms and magical entities. Any being within 60 feet is subject to thier hypnotic gaze , they must save vs paralysis or become passive and immobile lost in a personal world of bliss. Beings need only make one saving roll per encounter. Most formidably for many opponents they have the power of Spell Devouring - any magic spell cast upon them heals them 2 HP per spell level if they make their save rather than it's intended effect. They may devour as many spells per round as they have tentacles remaining.