Magical Beast · 7 hexes · SM +2 Spider Eater [Monster Manual, page 234]
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 (KYOS: 5d-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 (KYOS: 5d-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 (KYOS: 3d+2 cutting), Reach C. | 14 | thrust 2d cutting (KYOS: 3d+2 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
CER33
Offense19
Protection14
Threat tierstandard
Appearing2
Wandering3
Tags
- srd-3-5
- magical-beast
GCS v5 downloads
Where this one came from
- Source record
- Spider Eater [Monster Manual, page 234]
- 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/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.
- CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 19, PR 14, CER 33, 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. Appearing count capped at 2 because this creature carries a save-or-disable attack that the CER path does not price; the rating understates how dangerous a group of them is. 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.