Ochre Jelly - Dungeons on Automatic Bestiary

Ooze · 7 hexes · SM +2 Ochre Jelly [Monster Manual, page 202]

Attributes

ST0

DX8

IQ0

HT12

HP25

Will0

Per10

FP12

Basic Speed5

Basic Move2

Dodge8

DR—

Melee attacks

Usage	Level	Damage	Reach
Acid (Corrosion Aura)Always on, no attack roll. Any fleshy creature touching the jelly takes 1d-1 corrosion per second. The acid dissolves flesh only; it does not harm metal, stone or equipment. Selective.	no roll	1d-1 corrosion per second	C

Traits (14)

Blindness
Clinging
Doesn’t Breathe
Doesn’t Sleep
Hidebound
High Pain Threshold
Horizontal
Immunity to Metabolic Hazards
Injury Tolerance (Diffuse; Infiltration)
Injury Tolerance (No Eyes, No Head, No Neck)
Invertebrate
Mute
No Legs (Slithers)
No Manipulators

Notes

GCS ancestry draft: gcs/ochre-jelly.gct
Source template total: -116 points.
Library-rebuilt template total: -116 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 5,600 lbs.
Injury Tolerance (Diffuse; Infiltration): the jelly flows through gaps and cannot be crippled, and takes reduced damage from most physical blows.

Encounter rating

CER27

Offense18

Protection9

Threat tierstandard

Appearing1

Wandering3

GCS v5 downloads

Where this one came from

Source record: Ochre Jelly [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/ochre-jelly.gct
Source template total: -116 points.
Library-rebuilt template total: -116 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Issue #5: the always-on flesh-dissolving corrosion aura was added from the source's stated mechanics. The ochre jelly has no engulf ability in this source and is correctly a single-mechanic hazard.
CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 18, PR 9, CER 27, threat tier standard.
Conversion baseline reported OR -2, PR 9, CER 7 (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 (solitary): average number appearing 1, wandering weight 3. 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.