Gray Goo

Source: Alien Archive 4

CR: 14 XP: 38,400

N Fine construct (swarm, technological)

Init.: +8 Senses: darkvision 60 ft., low-light vision, sense through (vision [life-forms only]) 60 ft. Perception: +25

Defense

HP: 250

EAC: 28 KAC: 30

Fort: +14 Ref: +16 Will: +10

Offense

Speed: 50 ft., fly 50 ft. (Ex, perfect)

Melee: swarm attack +28 (8d6+20 B plus dismantle [DC 20])

Offensive Abilities: infest (DC 20)

Statistics

Str: +6 Dex: +8 Con: — Wis: +0 Int: +4 Cha: +0

Skills: Acrobatics +30, Computers +25, Survival +25

Languages: Common (can’t speak any language)

Ecology

Environment: any

Organization: solitary, pair, or storm (3–12)

Special Abilities

Dismantle (Ex) Creatures damaged by a gray goo’s swarm attack must succeed at a Reflex save or a random piece of hybrid or technological equipment that they’re wearing or wielding takes the same amount of damage. In addition, at the beginning of its turn, a gray goo can automatically deal its melee attack damage to an unattended hybrid or technological object in its space. Infest (Ex) As a standard action, a gray goo can infest an adjacent Medium or larger creature (Fortitude save negates). The gray goo moves inside the creature’s body, dealing double its normal swarm attack damage to its host each round at the beginning of the gray goo’s turn. A gray goo can’t use its normal attacks while infesting a host, but it can be targeted normally during the infestation and can end the infestation as a move action. A host reduced to 0 Hit Points while infested by a gray goo is reduced to dust and destroyed, as if killed by disintegrate. A gray goo infesting a host can be expelled by any effect that cures disease, such as remove affliction; the effective disease DC is the same as the infest ability’s.