Stirge - Dungeons on Automatic Bestiary

Magical Beast · SM -4 Stirge [Monster Manual, page 236]

Attributes

ST3

DX13

IQ2

HT10

HP3

Will9

Per12

FP10

Basic Speed5.75

Basic Move3

Dodge8

DR—

Melee attacks

Usage	Level	Damage	Reach
ProboscisProboscis (15): thrust 1d-5 large piercing (KYOS: 1d-9 large piercing), Reach C. The stirge can drain the victim’s life if the victim is helpless (pinned, stunned, unconscious, etc.), grappled, or willing. If he is wearing armor, the stirge’s proboscis damage must penetrate its DR. Once the stirge has bitten through the victim’s DR, it can drain 1 HP per second from him. For every 3 HP stolen, the stirge heals 1 HP or 1 FP (his choice). It cannot raise his HP or FP above normal this way.	15	thrust 1d-5 large piercing (KYOS: 1d-9 large piercing)	C
AttachAttach (18): The pincers are not very strong, but the stirge has four of them. Wrestling at DX+1 gives the stirge a ST score of 4 for the purpose of grappling. Effective skill 18 includes a +4 bonus for using 4 pincers at once. Reach C. The pincers give +2 with tasks that require a firm grip (including climbing).	18	The pincers are not very strong, but the stirge has four of them. Wrestling at DX+1 gives the stirge a ST score of 4 for the purpose of grappling. Effective skill 18 includes a +4 bonus for using 4 pincers at once	C

Traits (13)

Extra Arms 2 (Foot Manipulators)
Extra Legs (Four Legs; Cannot Kick)
Flight (Winged)
Foot Manipulators
Good Grip 1
Horizontal
Infravision
Night Vision 9
No Fine Manipulators
Restricted Diet (Fresh Blood)
Short Lifespan 2
Temperature Tolerance 1 (Hot)
Wild Animal

Skills (3)

15Brawling
12Survival (Swampland)
14Wrestling

Notes

GCS ancestry draft: gcs/stirge.gct
Source template total: -124 points.
Library-rebuilt template total: -124 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

CER1

Offense5

Protection-8

Threat tierminor

Appearing6

Wandering4

GCS v5 downloads

Where this one came from

Source record: Stirge [Monster Manual, page 236]
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/stirge.gct
Source template total: -124 points.
Library-rebuilt template total: -124 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 5, PR -8, CER 1, threat tier minor.
Encounter metadata derived (gregarious): average number appearing 6, wandering weight 4. 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-b3-cer-tails); GCS fidelity check passed, DOA playability check passed.
CER tail record. The rating was recomputed through the consumer CER path and the tail was read against package peers in review/reports/cer-audit.md; a floor of 1 reflects a genuinely feeble creature and a severe rating tracks the record's own HP, DR and damage.

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.