Sea Hag - Dungeons on Automatic Bestiary

Fey (Hag) · SM +0 Sea Hag [Monster Manual, page 144]

Attributes

ST10

DX10

IQ12

HT11

HP10

Will14

Per10

FP11

Basic Speed5.25

Basic Move5

Dodge8

DR1

Melee attacks

Usage	Level	Damage	Reach
Sharp TeethSharp Teeth (14): thrust 1d-2 cutting, Reach C.	14	thrust 1d-2 cutting	C
Sharp ClawsSharp Claws (14): thrust 1d-2 cutting, Reach C.	14	thrust 1d-2 cutting	C
Evil EyeEvil Eye (14): The sight of a sea hag is so revolting that anyone within 8 yards (other than creatures excluded by the hag) who sets eyes upon one must roll against HT every second or lose 1 ST for three minutes. Lower all skills based on ST by a like amount. ST penalties also reduce BL and damage. HP is not otherwise affected. This ability can only affect living beings, and its effects are cumulative.	14	The sight of a sea hag is so revolting that anyone within 8 yards (other than creatures excluded by the hag) who sets eyes upon one must roll against HT every second or lose 1 ST for three minutes. Lower all skills based on ST by a like amount. ST penalties also reduce BL and damage. HP is not otherwise affected. This ability can only affect living beings, and its effects are cumulative	—
Weakening PresenceBy taking a Concentrate maneuver and spending 2 FP, a sea hag can cast its dire gaze upon any single creature. If the hag wins in a Quick Contest of Will, the victim becomes paralyzed for three days. The hag’s roll takes a -1 penalty per yard of distance. After that, the subject is mentally stunned (p. B420) and may roll vs. Will once per second to recover.	—	—	C

Traits (23)

Amphibious
Appearance (Hideous)
Bad Temper (12)
Callous
Code of Honor (Hag)
Compulsive Scheming (12)
Doesn’t Breathe (Gills)
Early Maturation 4
Extended Lifespan 4
Greed (12)
Infravision
Loner (12)
Magic Resistance 1 (Improved)
Odious Racial Habit (Eats sapient beings)
Pressure Support 1
Restricted Diet (Carnivore)
Sadism (12)
Scales
Selfish (9)
Social Stigma (Monster)
Speak Underwater
Vulnerability (Cold Iron, x2)
Weakness (Immersion in fresh water, 1d per 30 minutes)

Skills (6)

14Acting
14Brawling
14Fast-Talk
14Intimidation
13Stealth
14Wrestling

Notes

GCS ancestry draft: gcs/sea-hag.gct
Source template total: 104 points.
Library-rebuilt template total: 104 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

CER29

Offense23

Protection6

Threat tierstandard

Appearing2

Wandering3

GCS v5 downloads

Where this one came from

Source record: Sea Hag [Monster Manual, page 144]
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/sea-hag.gct
Source template total: 104 points.
Library-rebuilt template total: 104 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Issue #5: 1 special ability construction(s) restored (Weakening Presence) and 1 annotated with the source's stated cost. 2 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 23, PR 6, CER 29, threat tier standard.
Conversion baseline reported OR 7, PR 6, CER 13 (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 (gregarious): average number appearing 2, 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.