Pyrohydra

Magical Beast (Fire) · 16 hexes · SM +3 Pyrohydra (Enraged Eggplant; answers SRD 3.5)

A hydra in dark red and charcoal scale with ember seams showing between the plates. Five heads, five sets of fangs, and each of them can breathe fire. Fire will not hurt it back, so the usual answer to a many-headed problem does not apply here.

Attributes

ST35

DX11

IQ2

HT13

HP35

Will12

Per12

FP13

Basic Speed6

Basic Move6

Dodge10

DR3

Melee attacks

Usage	Level	Damage	Reach
FangsFangs (13): thrust 4d+2 impaling, Reach C-2.	13	thrust 4d+2 impaling	C-2
Breathe FireBreathe Fire (13): The hydra breathes out a blast of fire, dealing thrust 4d-1 burning damage as large-area injury. This is a cone attack that uses rules from Area and Spreading Attacks (pp. B413-414). The cone is 1-yard wide and has a length of 7 yards (ST/5). Each use costs 2 FP. It is possible to make the cone wider by using the rules from Cones of Power (GURPS Dungeon Fantasy Monsters 4: Dragons, p. 10).	13	The hydra breathes out a blast of fire, dealing thrust 4d-1 burning damage as large-area injury. This is a cone attack that uses rules from Area and Spreading Attacks (pp. B413-414). The cone is 1-yard wide and has a length of 7 yards (ST/5). Each use costs 2 FP. It is possible to make the cone wider by using the rules from Cones of Power (GURPS Dungeon Fantasy Monsters 4: Dragons, p. 10)	—

Traits (18)

• Amphibious
• Combat Reflexes
• Discriminatory Smell
• Extra Attack 2
• Extra Head 4 (Long 3)
• Extra Legs (Four Legs)
• Horizontal
• Immunity to Noxious Fire Effects
• Infravision
• Long Neck 3
• Night Vision 5
• No Fine Manipulators
• Peripheral Vision
• Regeneration (Very Fast)
• Regrowth (Doubling, Heads Only; Bane, Acid or Cold)
• Supernatural Durability (Variant)
• Temperature Tolerance 3 (Hot)
• Wild Animal

Skills (4)

• 13Brawling
• 13Innate Attack (Breath)
• 12Survival (Swampland)
• 12Tracking

Notes

• GCS ancestry draft: gcs/pyrohydra.gct
• Source template total: 631 points.
• Library-rebuilt template total: 631 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 16 hexes; Weight 4,000 lbs.

Encounter rating

CER76

Offense38

Protection38

Threat tiermajor

Appearing1

Wandering2

Tags

• srd-3-5
• magical-beast
• fire

GCS v5 downloads

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

Where this one came from

Source record

Pyrohydra

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/pyrohydra.gct
• Source template total: 631 points.
• Library-rebuilt template total: 631 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 38, PR 38, CER 76, threat tier major.
• Encounter metadata derived (solitary): average number appearing 1, wandering weight 2. 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.