Ooze Mephit - Dungeons on Automatic Bestiary

Outsider (Water) · SM -1 Ooze Mephit [Monster Manual, page 183]

Attributes

ST7

DX10

IQ9

HT10

HP7

Will9

Per9

FP10

Basic Speed5

Basic Move5

Dodge8

DR0

Melee attacks

Usage	Level	Damage	Reach
Blunt ClawsBlunt Claws (12): thrust 1d-2 crushing (KYOS: 1d-5 crushing), Reach C.	12	thrust 1d-2 crushing (KYOS: 1d-5 crushing)	C
Breath WeaponBreath Weapon (12): A 10-yard jet of caustic acid erupts from the mephit’s mouth. It uses Innate Attack (Breath) to hit. Don’t apply range penalties; treat this as a long melee weapon rather than a ranged attack. It does 1d corrosion damage, and has a 1/2D range of 5 yards. If any damage penetrates the target’s DR, he must make a HT roll, at -1 per 2 points of injury or suffer from moderate pain (p. B428) for (20 – HT) minutes as his skin and eyes burn and itch.This ability costs 1 FP to use.	12	A 10-yard jet of caustic acid erupts from the mephit’s mouth. It uses Innate Attack (Breath) to hit. Don’t apply range penalties; treat this as a long melee weapon rather than a ranged attack. It does 1d corrosion damage, and has a 1/2D range of 5 yards. If any damage penetrates the target’s DR, he must make a HT roll, at -1 per 2 points of injury or suffer from moderate pain (p. B428) for (20 – HT) minutes as his skin and eyes burn and itch.This ability costs 1 FP to use	—
Stinking CloudStinking Cloud (12): By spending 2 FP, a mephit may fill a two-yard-radius area with bad smelling smoke. This gives -3 to all vision rolls made through it. To place the cloud at a distance, he uses Innate Attack (Gaze), with normal range penalties, but at +4 for affecting an area. The initial attack roll places the effect. It then drifts from that point with the wind.	12	By spending 2 FP, a mephit may fill a two-yard-radius area with bad smelling smoke. This gives -3 to all vision rolls made through it. To place the cloud at a distance, he uses Innate Attack (Gaze), with normal range penalties, but at +4 for affecting an area. The initial attack roll places the effect. It then drifts from that point with the wind	—

Traits (10)

Amphibious
Bad Smell
Curious (12)
Doesn’t Breathe (Gills)
Doesn’t Eat or Drink
Regeneration (Fast; Accessibility, Only if in a wet or muddy environment)
Skinny
Slippery 5
Speak Underwater
Vulnerability (Dehydration, x2)

Skills (3)

12Brawling
12Innate Attack (Breath)
12Innate Attack (Gaze)

Notes

GCS ancestry draft: gcs/ooze-mephit.gct
Source template total: 71 points.
Library-rebuilt template total: 71 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Review attacks, special abilities, encounter frequency, treasure, grappling, and GCS modifiers before approval.

Encounter rating

CER8

Offense12

Protection-4

Threat tierminor

Appearing4

Wandering4

GCS v5 downloads

Where this one came from

Source record: Ooze Mephit [Monster Manual, page 183]
Source system: gurps_4e_fan_conversion / author_permission
Released under: cc_by_4_0
Conversion: 0.2.0-reviewed
Review status: approved
Credit: Original GURPS conversion by Enraged Eggplant, from Monsters (May 11, 2024); adapted and republished with permission.

GCS ancestry draft: gcs/ooze-mephit.gct
Source template total: 71 points.
Library-rebuilt template total: 71 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Issue #5: 0 special ability construction(s) restored and 1 annotated with the source's stated cost. 1 save-or-disable construction(s) are scored through the affliction term at the source's stated point cost, or at Binding ST where the source builds the ability as a Binding.
CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 12, PR -4, CER 8, threat tier minor.
Conversion baseline reported OR 9, PR -4, CER 5 (tier minor). The reviewed values come from the consumer CER implementation, which rounds damage once after the damage-type multiplier and credits ranged accuracy; the conversion baseline ceilinged the damage base first and ignored range.
Encounter metadata derived (default): average number appearing 4, wandering weight 4. Encounter metadata derived for 0.2.0 from the reviewed threat tier and creature class (appearing: minor 4 / standard 2 / major 1 / severe 1, forced to 1 for solitary classes — including swarms, which are a single multi-body creature — and raised to 6 for gregarious minor creatures; wandering weight: minor 4 / standard 3 / major 2 / severe 1). The fan-conversion source states no appearing-in-numbers or wandering values, so these are derived, not source mechanics.
Lair, treasure, and grappling remain unpopulated in 0.2.0 by package policy: the authorized fan-conversion source states no lair, treasure, or grappling values, and review declines to invent them. See review/policy/0.2.0-empty-field-policy.md.
Review approved by automated-mechanical-review on 2026-07-26 (batch ee-2026-07-26-b4-special-mechanics); GCS fidelity check passed, DOA playability check passed.
Special-mechanics record. Mechanics the CER path cannot price are named per record in review/reports/cer-audit.md rather than folded into the number, and encounter counts are capped where a save-or-disable attack is present.

Enraged Eggplant GURPS monster conversions; used, adapted, and republished with unrestricted permission from the author. Portrait and tokens are AI-generated original art. Sources and credits.