Destrachan - Dungeons on Automatic Bestiary

Aberration · 3 hexes · SM +1 Destrachan (Enraged Eggplant; answers SRD 3.5)

An eyeless armoured biped on four clawed legs, its wedge of a head flanked by two enormous ribbed membrane fans and fronted by a ring of resonating teeth. It hears with extraordinary precision and attacks with sound alone, tuned to shatter stone, gear or the inside of a body as it prefers.

Attributes

ST18

DX10

IQ10

HT11

HP18

Will10

Per10

FP11

Basic Speed5.25

Basic Move6

Dodge8

DR2

Melee attacks

Usage	Level	Damage	Reach
Sharp ClawsSharp Claws (10): thrust 1d+1 cutting, Reach C-1.	10	thrust 1d+1 cutting	C-1
Destructive HarmonicsDestructive Harmonics (12): A destrachan can emit a scream of destructive harmonics in a cone that has a maximum width of 10 yards or in a circular area with an 8-yard radius around itself. This attack has two modes.	12	A destrachan can emit a scream of destructive harmonics in a cone that has a maximum width of 10 yards or in a circular area with an 8-yard radius around itself. This attack has two modes	—

Traits (12)

Acute Hearing 4
Bad Grip 1
Blindness
Callous
Cannot Speak
Discriminatory Hearing
Injury Tolerance (No Eyes)
Protected Hearing
Sadism (12)
Sonar
Subsonic Hearing
Ultrahearing

Skills (2)

12Innate Attack (Breath)
12Stealth

Notes

GCS ancestry draft: gcs/destrachan.gct
Source template total: 218 points.
Library-rebuilt template total: 218 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.
GCS template includes a +78-point reconciliation child requiring decomposition.
Size 3 hexes.

Encounter rating

CER27

Offense16

Protection11

Threat tierstandard

Appearing1

Wandering3

GCS v5 downloads

Where this one came from

Source record: Destrachan
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.
Description: Written by Dungeons on Automatic, released under cc_by_4_0

GCS ancestry draft: gcs/destrachan.gct
Source template total: 218 points.
Library-rebuilt template total: 218 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Issue #5: 0 special ability construction(s) restored and 1 annotated with the source's stated cost. 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.
GCS ancestry reconciliation adjudicated: the published template total is 218 points and the parsed source children sum to 140, a difference of +78. Classified as large grouped construction not decomposed — a large residual: this record's source entry groups a substantial block of abilities (typically spellcasting, breath weapons, or an alternative-ability set) into a single construction that the prose parser could not decompose. The author's published total is preserved and the residual stays visible as a reconciliation child rather than being silently absorbed. The authorized source total is preserved; the remaining manual step is opening gcs/destrachan.gct in GCS to replace the reconciliation child with native constructions where the grouped ability can be decomposed.
CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 16, PR 11, CER 27, threat tier standard.
Conversion baseline reported OR 9, PR 11, CER 20 (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.
Description text is original Dungeons on Automatic prose written from this record's own converted statistics and from the project's art direction for the creature. It is not derived from the authorized fan-conversion source, which states no creature descriptions, and not from any SRD. It carries its own authorship and CC BY 4.0 terms in the description field. See review/policy/description-policy.md.
Review approved by automated-mechanical-review on 2026-07-26 (batch ee-2026-07-26-b2-gcs-reconciliation); GCS fidelity check passed, DOA playability check passed.
The source-total difference is classified and documented in conversionNotes; the authorized published total is preserved and the residual stays visible as a reconciliation child.
Visual GCS verification of the .gct is not claimed by this decision; checks.gcsVisualPass is false.

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.