Ooze · 7 hexes · SM +2 Gray Ooze [Monster Manual, page 202]
Attributes
ST20
DX8
IQ0
HT12
HP35
Will0
Per10
FP12
Basic Speed5
Basic Move1
Dodge8
DR20
Melee attacks
| Usage | Level | Damage | Reach |
|---|---|---|---|
| Acid (Corrosion Aura)Always on, no attack roll. Any organic material or metal touching the ooze takes 1d-1 corrosion per second; stone is unaffected. Engulfed creatures and objects take it as large-area injury. Selective. | no roll | 1d-1 corrosion per second | C |
| Engulf (Binding ST 12)No attack roll is necessary; the quarry may defend only by dodging and retreating. Moving through an SM-1 or smaller creature is an automatic slam. A victim who fails to dodge is pinned if smaller than the ooze, or partly stuck and grappled if equal or larger. Breaking free is a Quick Contest of ST. The ooze may constrict an engulfed victim at effective ST 12. | no roll | Constriction Attack, effective ST 12 (thrust 1d-1 crushing) | C |
Traits (17)
- Amphibious
- Blindness
- Clinging
- Doesn’t Breathe
- Doesn’t Sleep
- Hidebound
- High Pain Threshold
- Horizontal
- Immunity to Metabolic Hazards
- Immunity to Noxious Extreme Temperature Effects (Cold and Fire) Effects
- Injury Tolerance (Homogenous, No Blood, No Eyes, No Head, No Neck)
- Invertebrate
- Invisibility (Affects Machines; Fringe)
- Mute
- No Legs (Slithers)
- No Manipulators
- Slippery 5
Notes
- GCS ancestry draft: gcs/gray-ooze.gct
- Source template total: 90 points.
- Library-rebuilt template total: 90 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.
- Size 7 hexes; Weight 700 lbs.
Encounter rating
CER68
Offense29
Protection39
Threat tiermajor
Appearing1
Wandering2
Tags
- srd-3-5
- srd-5-1
- ooze
GCS v5 downloads
Where this one came from
- Source record
- Gray Ooze [Monster Manual, page 202]
- 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/gray-ooze.gct
- Source template total: 90 points.
- Library-rebuilt template total: 90 points.
- CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
- Issue #5: the always-on corrosion aura and the automatic engulf (Binding 12) were added from the source's stated mechanics.
- CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 29, PR 39, CER 68, threat tier major.
- Conversion baseline reported OR -3, PR 39, CER 36 (tier standard). 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 (solitary): average number appearing 1, wandering weight 2. 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.