Achaierai - Dungeons on Automatic Bestiary

Outsider (Evil, Lawful) · 4 hexes · SM +2 Achaierai [Monster Manual, page 9]

Attributes

ST21

DX11

IQ10

HT12

HP18

Will10

Per10

FP12

Basic Speed6

Basic Move9

Dodge9

DR2

Melee attacks

Usage	Level	Damage	Reach
Sharp BeakSharp Beak (14): thrust 2d+1 large piercing (KYOS: 3d+3 large piercing), Reach C.	14	thrust 2d+1 large piercing (KYOS: 3d+3 large piercing)	C
Sharp ClawsSharp Claws (14): thrust 2d+1 cutting (KYOS: 3d+3 cutting), Reach C-1.	14	thrust 2d+1 cutting (KYOS: 3d+3 cutting)	C-1
Black CloudBy spending 2 FP and performing a Ready maneuver, an achaierai can release a choking, toxic black cloud. It spreads in a 2-yard radius area around the achaierai, lasts 10 seconds, and drifts with the wind. The cloud imposes a -3 penalty on all vision- and Infravision-based rolls within the area. Additionally, every creature that inhales the cloud must make an HT roll. If it fails, it takes 1d toxic damage, ignoring DR, and begins to hallucinate for margin of failure minutes. After that the subject is stunned (p. B420) and may roll vs. HT once per second to recover. Achaierais are immune to this ability.	—	1d toxic	2 yards

Traits (19)

Affected by Magnetism
Early Maturation 3
Extended Lifespan 1
Extra Arms 2 (Foot Manipulators)
Extra Legs (Four Legs)
Feathers
Ham-Fisted 1
Horizontal
Infravision
Injury Tolerance (No Neck)
Magic Resistance 2 (Improved)
Odious Racial Habit (Eats sapient beings)
Peripheral Vision
Reduced Consumption 3 (Cast-Iron Stomach)
Restricted Diet (Carnivore)
Sadism (12)
Social Stigma (Monster)
Vulnerability (Anarchic Weapons, x2)
Vulnerability (Holy Weapons, x2)

Skills (4)

14Brawling
14Running
14Stealth
12Survival (Acheron)

Notes

GCS ancestry draft: gcs/achaierai.gct
Source template total: 213 points.
Library-rebuilt template total: 213 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 4 hexes; Weight 750 lbs.

Encounter rating

CER40

Offense26

Protection14

Threat tierstandard

Appearing2

Wandering3

GCS v5 downloads

Where this one came from

Source record: Achaierai [Monster Manual, page 9]
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/achaierai.gct
Source template total: 213 points.
Library-rebuilt template total: 213 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Issue #5: 1 special ability construction(s) restored (Black Cloud). 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 26, PR 14, CER 40, threat tier standard.
Conversion baseline reported OR 21, PR 14, CER 35 (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. 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.