The Thing From Another World in Mothership

I don't think anyone has done this exactly, but I think it's time to do a series on adopting various famous monsters to the Mothership rules. Let's start with one of the greatest of all time: the Thing!

Love this Alt Poster!

The Thing's key traits:

An alien creature that is in fact a cell colony with the ability to absorb and replicated/replace the cells of any other creature, taking on their appearance, abilities and even their identity. 

The Thing's original appearance is difficult to discern, and it may have no consistent appearance (even the description of what it might have looked like, with three eyes, could just be the current form it was mimicking).

The Thing is intelligent, and presumably retains knowledge from prior assimilated victims. This includes the ability to craft and pilot something as sophisticated as a starship.

When absorbing a creature, it takes the Thing about 45 minutes to completely convert a human sized target into its own. 

The Thing exhibits a weakness to fire, though this could be better described as "it burns like anything else." But due to its malleable, ever-changing nature and ability to remember and mimic any life form it has previously absorbed, the Thing can sustain and recover from most damage with only modest initial impact. Fire and energy damage that can destroy it at the cellular level is most effective at destroying the Thing.

The Stats for a piece of the Thing depend heavily on what it is mimicking and/or what sort of amalgamation it forms in the moment. Several stat blocks will be provided to reflect different sized/focused forms of the Thing as a result. 

Special Qualities: The Thing has these traits in all forms:

Infectious. All Things have an infectious trait, and skin exposure to the Thing leads to assimilation when exposed. PCs who take any damage or come into any skin contact with some portion of the creature, even at the cellular level, must make a BODY[-] check or they are infected and have 45 minutes to assimilation into a Humanoid Thing.

Malleable and Resilient. The Thing takes damage from kinetic weaponry, but it rapidly heals, repairs and restores function. It regains 1 Wound and equivalent health every minute, and as a special feature may heal even sooner (per combat turn). It is unable to use this feature if it takes fire or energy damage for one minute, and is "dead" if it loses all wounds from such damage, with only a slight change a portion of its mass survives.

Head Crab Thing: C: 25%, 1D10 DMG, I: 50%, AP 1D5-1, W1(10) - may have 1D5 additional appendage features (EX: 1-crab legs, 2-extendable tongue with a grasping feature, 3-eye stalks, 4-spits acid, 5-whip tail with poison barb)

Humanoid Thing: C 50%, 2D10 DMG, I: 60%, AP 1D5-1, W2(20) - may have 1D5 additional surprise features (EX: 1-claw arm, 2-head splits for attacking maw that does 4D10 DMG, 3-infecting tendrils, 4-chest maw (4D10 DMG), 5-exotic eyesight); Special: indistinguishable from the humanoid it mimics until exposed.

Monstrous Form Large Thing: C 75%, 4D10 DMG, I: 90%, AP 5+1D5, W3(30) - will have !D5 additional features (EX: 1-multiple limbs (1D4) for extra attacks, 2-infectious tentacles, 3-vomiting infectious attack, 4-wings (if local atmosphere and gravity support it), 5-spines (50% chance they shoot))

Exposing The Thing: In the film, it is revealed that the Thing's individual cells are engrained with a survival instinct, so jamming a hot wire into blood samples reveals what is real and what is imitation blood. Creative PCs may find other interesting ways to reveal imitations in their midst. For example, The Thing often has an exterior form that mimics the appearance of the human it just assimilated, but may have an internal morphology that hides appendages intended for attack or other special purposes. An x-ray may reveal these internal differences.