The Strange
It was a terrible, indescribable thing vaster than any subway train—a shapeless congeries of protoplasmic bubbles, faintly self-luminous, and with myriads of temporary eyes forming and un-forming as pustules of greenish light all over the tunnel-filling front that bore down upon us, crushing the frantic penguins and slithering over the glistening floor that it and its kind had swept so evilly free of all litter.—At the Mountains of Madness, by H.P. Lovecraft
Shoggoths vary in size, but usually the smallest are 10 feet (3 m) across at least. They are the product of incredibly advanced bioengineering by a strange race in the distant past. Angry, vicious predators, they are feared by any who have ever heard of these rare creatures (or who have encountered them and somehow survived to tell the tale).
Rumors abound of a few very rare, particularly intelligent shoggoths that intentionally reduce their own mass and learn to take on the forms of humans so that they can integrate themselves into society (and prey upon humans at their leisure).
Motive: Hungers for flesh
Environment (Innsmouth | Magic or Weird Science): Anywhere
Health 35
Damage Inflicted: Major wound (10 points)
Movement: Long
Modifications: Speed defense as level 6 due to size.
Combat: Shoggoths sprout tendrils and mouths, and they spread their wide, amorphous forms, allowing them to attack all foes within immediate range. Those struck by the shoggoth's attack are grabbed and engulfed by the thing's fluid, gelatinous body and suffer damage each round until they pull themselves free (and they can take no other physical action while they are caught). Further, each round of entrapment, one object in the victim's possession is destroyed by the foul juices of the amorphous horror.
Shoggoths regenerate 5 points of health each round. They have 10 points of Armor against fire, cold, and electricity.
Interaction: One does not reason with a shoggoth.
Use: The PCs find an ancient structure of metal and stone. Wandering through it, they note that every surface is clear of dirt and debris. Soon they discover why—a shoggoth squirms through its halls, absorbing everything it comes upon (and it fills the passages it moves down, floor to ceiling, wall to wall).
Loot: Within a shoggoth, one might find a cypher or a relic of the Strange.
GM Intrusion: The character is engulfed in the shoggoth, his gear scattered throughout the thing's undulating form, and his body turned upside down so that the difficulty of escape attempts is increased by one step.