Nightmare - Dungeons on Automatic Bestiary

Outsider (Evil) · 3 hexes · SM +1 Nightmare [Monster Manual, page 194]

Attributes

ST22

DX11

IQ10

HT12

HP22

Will10

Per10

FP12

Basic Speed6

Basic Move9

Dodge11

DR3

Melee attacks

Usage	Level	Damage	Reach
HoovesHooves (12): thrust 2d+1 crushing (KYOS: 3d crushing) + 1d-1 follow-up burning, Reach C-1. Flaming Hooves: Burning Attack 1d-1 (Follow-Up, Hooves, +0%; Magical, -10%) Resolve as stated by the construction; the source gives no separate resolution text.	12	thrust 2d+1 crushing (KYOS: 3d crushing) + 1d-1 follow-up burning	C-1
FangsFangs (12): thrust 1d-1 impaling (KYOS: 2d-1 impaling), Reach C.	12	thrust 1d-1 impaling (KYOS: 2d-1 impaling)	C
Astral ProjectionAstral Projection (10): The nightmare can leave its body behind, unconscious, while projecting its spirit to the Astral Plane by making an IQ roll and spending 1 FP. While there, it cannot cast spells or otherwise affect the world in any meaningful way. The spirit form is visible, but insubstantial. This ability can be maintained indefinitely, provided the nightmare continues paying 1 FP per minute, but the body’s need to eat, drink, sleep, etc. effectively limits the duration to a day or so – longer if the body is left with friends, or otherwise cared for.	10	The nightmare can leave its body behind, unconscious, while projecting its spirit to the Astral Plane by making an IQ roll and spending 1 FP. While there, it cannot cast spells or otherwise affect the world in any meaningful way. The spirit form is visible, but insubstantial. This ability can be maintained indefinitely, provided the nightmare continues paying 1 FP per minute, but the body’s need to eat, drink, sleep, etc. effectively limits the duration to a day or so – longer if the body is left with friends, or otherwise cared for	—
Nightmare AuraNightmare Aura (10): Every sapient creature within 4 yards of the nightmare must roll a Quick Contest of Will against it every second or succumb to the nightmare aura. The victim of this aura gains the Nightmares (6) disadvantage (p. B144) for one day. The nightmare may exclude any creatures from this effect.	10	Every sapient creature within 4 yards of the nightmare must roll a Quick Contest of Will against it every second or succumb to the nightmare aura. The victim of this aura gains the Nightmares (6) disadvantage (p. B144) for one day. The nightmare may exclude any creatures from this effect	—
SmokeSmoke (13): The nightmare may fill a two-yard-radius area within 10 yards with bad smelling smoke. This gives -3 to all vision and Infravision rolls made through it. To place the cloud at a distance, it uses Innate Attack (Breath), 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. Every creature that inhales the smoke, begins to cough (is at -3 to DX and -1 to IQ, and cannot use Stealth) for 3 minutes, if it fails a HT roll.	13	The nightmare may fill a two-yard-radius area within 10 yards with bad smelling smoke. This gives -3 to all vision and Infravision rolls made through it. To place the cloud at a distance, it uses Innate Attack (Breath), 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. Every creature that inhales the smoke, begins to cough (is at -3 to DX and -1 to IQ, and cannot use Stealth) for 3 minutes, if it fails a HT roll	—

Traits (22)

Bestial
Callous
Cannot Speak
Combat Reflexes
Doesn’t Breathe
Doesn’t Eat or Drink
Enhanced Move 1 (Air)
Enhanced Move 1 (Ground)
Extra Legs (Four Legs)
Flight (Magical)
Hidebound
Horizontal
Immunity to Noxious Fire Effects
Infravision
No Fine Manipulators
Odious Racial Habit (Eats sapient beings)
Sadism (12)
Social Stigma (Monster)
Telesend (Magical; Racial; Vague)
Temperature Tolerance 5 (Hot)
Unholy Touch
Vulnerability (Holy Weapons, x2)

Skills (5)

13Aerobatics
12Brawling
13Flight
13Innate Attack (Breath)
13Mount

Notes

GCS ancestry draft: gcs/nightmare.gct
Source template total: 372 points.
Library-rebuilt template total: 372 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 3 hexes; Weight 1,500 lbs.

Encounter rating

CER50

Offense26

Protection24

Threat tierstandard

Appearing2

Wandering3

GCS v5 downloads

Where this one came from

Source record: Nightmare [Monster Manual, page 194]
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/nightmare.gct
Source template total: 372 points.
Library-rebuilt template total: 372 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Issue #5: 1 special ability construction(s) restored (Flaming Hooves) and 2 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 26, PR 24, CER 50, threat tier standard.
Conversion baseline reported OR 15, PR 24, CER 39 (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 (default): average number appearing 2, wandering weight 3. Appearing count capped at 2 because this creature carries a save-or-disable attack that the CER path does not price; the rating understates how dangerous a group of them is. 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.