Spider Eater

Magical Beast · 7 hexes · SM +2 Spider Eater (Enraged Eggplant; answers SRD 3.5)

A wasp-bodied hunter the size of a horse with heavy mandibles and a long sting, oily enough that a web cannot hold it. It hunts giant spiders specifically, paralyses one, and lays an egg in it for the larva to eat its way out of later.

Attributes

ST20

DX12

IQ2

HT12

HP20

Will9

Per12

FP12

Basic Speed6

Basic Move5

Dodge9

DR1

Melee attacks

Usage	Level	Damage	Reach
StingSting (14): thrust 3d-1 large piercing plus follow-up affliction (resisted by HT, onset 1 minute, paralysis for margin of failure weeks, then physical stun), Reach C-1. Poison: Affliction 1 (HT; Extended Duration, 10,000x, +160%; Follow-Up, Sting, +0%; Onset, 1 minute, -10%; Paralysis, +150%) Resolve as stated by the construction; the source gives no separate resolution text.	14	thrust 3d-1 large piercing plus follow-up affliction (resisted by HT, onset 1 minute, paralysis for margin of failure weeks, then physical stun)	C-1
MandiblesMandibles (14): thrust 2d cutting, Reach C.	14	thrust 2d cutting	C
ImplantFemale spider eaters lay their eggs inside paralyzed creatures of SM+2 or bigger. The eggs gestate for six weeks, then the host takes 2d toxic damage each hour for 13 cycles. This damage cannot be resisted. Once the host loses 1/2 of their HP to this effect, they begin experiencing terrible pain (p. B428) until they heal above that threshold. Once the host loses 2/3 of their HP to this effect, they begin experiencing agony (p. B428) until they heal above that threshold. The eggs can be removed with a successful Surgery roll (failure deals 1d-1 injury), or a Cure Disease spell cast at a -5 penalty. If the host dies to this effect, the young emerges, literally devouring the host from inside.	—	2d toxic	C

Traits (11)

• Absolute Direction
• Discriminatory Smell
• Flight (Winged)
• Horizontal
• Infravision
• Night Vision 9
• No Fine Manipulators
• Peripheral Vision
• Restricted Diet (Carnivore)
• Slippery 10 (Magical)
• Wild Animal

Skills (4)

• 14Brawling
• 12Mount
• 12Survival (Woodlands)
• 12Tracking

Notes

• GCS ancestry draft: gcs/spider-eater.gct
• Source template total: 126 points.
• Library-rebuilt template total: 126 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 7 hexes; Weight 4,000 lbs.

Encounter rating

CER41

Offense27

Protection14

Threat tierstandard

Appearing2

Wandering3

Tags

• srd-3-5
• magical-beast

GCS v5 downloads

• ↓ Character sheet (.gcs)Open directly in GCS
• ↓ Ancestry template (.gct)Apply to any character

Where this one came from

Source record

Spider Eater

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/spider-eater.gct
• Source template total: 126 points.
• Library-rebuilt template total: 126 points.
• CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
• Issue #5: 2 special ability construction(s) restored (Implant, Poison). No disabling construction on this record carries a cost the affliction term can score.
• Issue #14: Sting's paralytic follow-up priced through the affliction term at 40 points, the computed cost of the source's stated construction (Affliction 1 at a net +300%). Implant remains unpriced: implantation happens to an already-paralyzed host over six weeks, outside any combat the rating measures.
• CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 27, PR 14, CER 41, threat tier standard.
• Conversion baseline reported OR 20, PR 14, CER 34 (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 (gregarious): 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.
• 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-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.