The lithe humanoid is without any distinct facial features other than the vague impression of a nose and indents where eyes should be; though there is a golden glow implies ocular organs of some sort under its epidermis. At first glance, one might think this is due to a pale cloth drawn tight over its visage, but whenever the creature moves its plain that is some sort of artificial skin. The rest of its body is a smooth crimson shell of molded musculature. Raised, thicker and darker patches of skin form intricate patterns across its shoulders, down its spine and each arm.

The synth sanitizer wears simple clothing, a crossed halter with spaulders attached; bracers and boots of a barbaric design. However, these accessories are crafted from materials not of this sphere. It’s left forearm is dominated by a thick bracer made of a strange, yellow metal etched with alien symbols. With a thought, the bracer rapidly unfolds like flower petals to form a sturdy shield or return to its base state. The sanitizer also carries an unusual cylinder of the same otherworldly steel. This rod is connected via a flexible tube to a carapaced backpack and produces a jet of acidic mist.

Cleaner. While sometimes the Synth Chaser and other greater androids will leave behind grisly trophies to mark territory and rattle foes, the race as a whole prefers to remain a mysterious threat for as long as it can. That is where synth sanitizers come in. They are deployed wherever one of their betters has left a swath of carnage, or worse yet fallen. Using their fumigation rod, the sanitizers burn away any physical evidence left behind leaving only melted sludge behind. If they encounter resistance the sanitizers are equipped with retractable shields that can launch razor-sharp petals. In addition, each sanitizer can analyze blood left behind to trace any potential witnesses that might need to be washed away. Oddly, synth sanitizers have no extra defense against the acid they expel. If one of them falls, the others emotionlessly eradicate its existence as well.

Synth Sanitizer

Medium humanoid (synth), lawful evil

Armor Class 14 (shield)

Hit Points 38 (7d8 + 7)

Speed 30ft

Str 16 Dex 14 Con 12 Int 10 Wis 12 Cha 8

Saving Throws Str +5

Skills Perception Investigation +2, Perception +3, Survival +3

Damage Immunities poison

Condition Immunities charmed, exhaustion, frightened, poisoned

Senses darkvision 60 ft., passive Perception 13

Languages Synth

Challenge 2 (450 xp)

Blood Tracker.

After touching a creature's blood and analyzing it as a bonus action, the sanitizer can track that creature. The sanitizer as advantage on any Wisdom (Perception) or Wisdom (Survival) check it makes to find it for the next 8 hours.

Death Burst.

When the synth grinder dies, it explodes in a burst of bones and necrotic sludge. Each creature within 15 ft. of it must make a DC 12 Dexterity saving throw, taking 7 (2d6) piercing damage and 7 (2d6) necrotic damage on a failed save, or half as much damage on a successful one.

Unsavory Skin.

The sanitizer's shell produces an overpowering, antisceptic smell. Any creature that begins their turn within 5ft of the synth must succeed on a Constitution save DC 11 Constitution save or suffer Disadvantage on attack rolls due to watering eyes, leaking nose, and burning throat. Undead and Constructs are immune to this effect as are other synths.

In addition, the sanitizer has advantage on all saves against diseases.

Actions

Shield Bash.

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6+2) bludgeoning damage.

Razor Petal.

Ranged Weapon Attack: +4 to hit, range 30/60 ft., one target. Hit: 6 (1d8+2) slashing damage.

Fumigation Rod (Recharge 5-6).

TThe synth sanitizer levels its fumigation rod and produces a 15' cone of caustic gas. Creatures within the cone must succeed on a DC 12 Dexterity save or take 10 (3d6) acid damage, or half damage on success.