Drider - Dungeons on Automatic Bestiary

Aberration · 4 hexes · SM +1 Drider [Monster Manual, page 89]

Attributes

ST11

DX11

IQ10

HT11

HP15

Will11

Per10

FP11

Basic Speed5.5

Basic Move5

Dodge8

DR1

Melee attacks

Usage	Level	Damage	Reach
Sharp TeethSharp Teeth (13): thrust 1d-2 cutting plus follow-up 1d-1 toxic (3 1-hour cycles, resisted by HT-3, -3 ST after loss of 2/3 HP), Reach C.	13	thrust 1d-2 cutting plus follow-up 1d-1 toxic (3 1-hour cycles, resisted by HT-3, -3 ST after loss of 2/3 HP)	C
TalonsTalons (11): thrust 1d+1 cutting or impaling (KYOS: 2d-1 cutting or impaling), Reach C-1.	11	thrust 1d+1 cutting or impaling (KYOS: 2d-1 cutting or impaling)	C-1
DaggerDagger (15): thrust 1d-2 impaling, Reach C-1.	15	thrust 1d-2 impaling	C-1
Short BowShort Bow (15): thrust 1d-1 impaling, Acc 1, Range 165/220, RoF 1, Shots 1(2).	15	thrust 1d-1 impaling, Acc 1, Range 165/220, RoF 1, Shots 1(2)	—

Traits (13)

Climbing Line
Clinging
Extended Lifespan 3
Extra Legs (Eight Legs; Long 1)
Immunity to Poison
Infravision
Intolerance (Drow)
Lifting ST 4
Magic Resistance 1 (Improved)
Night Vision 5 (-5 is the native illumination level)
Social Stigma (Monster)
Striking ST 4 (Lower Body)
Uses weapons designed for SM+0 creatures

Skills (6)

15Bow
13Brawling
15Climbing
12Innate Attack (Gaze)
15Knife
14Stealth

Notes

GCS ancestry draft: gcs/drider.gct
Source template total: 191 points.
Library-rebuilt template total: 191 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.
Poison (follow-up on Bite): Toxic Attack 1d-1 (Cyclic, 1 hour, 2 cycles, Resistible, +20%; Follow-Up, Bite, +0%; Resistible, HT-3, -15%; Symptoms, 2/3 HP, -3 ST, +15%) Resolve as stated by the construction; the source gives no separate resolution text.

Encounter rating

CER18

Offense10

Protection8

Threat tierminor

Appearing1

Wandering4

GCS v5 downloads

Where this one came from

Source record: Drider [Monster Manual, page 89]
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/drider.gct
Source template total: 191 points.
Library-rebuilt template total: 191 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Issue #5: 2 special ability construction(s) restored (Poison). No disabling construction on this record carries a cost the affliction term can score.
CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 10, PR 8, CER 18, threat tier minor.
Conversion baseline reported OR 11, PR 8, CER 19 (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 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-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.