Arcadia Wiki
Arcadia Wiki

Unrelated to the traditional D&D Monster called the Hydra.

The Hydra Demon is a monster created by Neal Pass Erickson.

Cobra like, but thicker, with claws/pincers ~6’ down the body. Underside is softer overlapping scales, top side is skinless and fleshy but covered in move-able, discolored, bony plates. They are curved to fit with the body, and attached only on one side (top).

When angered, aggressive, or regulating temperature, the plates fan up and down. About a third of the way down the body, a set of scorpion like pincers covered in chitin plating extend and face forward. An expandable frill stretches between the wide skull and the body for ~2 feet.

Has a 360° quill with dozens of spikes at the end of its tail, only one thrown with each attack. The spikes will regrow.

Does not have legs.


While appearing animalistic from the outside, they are seen patrolling the ramparts of Demon Fortresses, and also seen as acting as solo scouts. In combat Hydras are ranged units, hurling their poisoned strings out at their enemies, exhibiting a level of darkvsion in the process. They are seen to be subservient to Task Master Demons & Lensman Demons. Hydras haven't be observed to date ever ordering another kind of demon around, or even being able to speak any language.




2e Combat Stats - These stats can differ based on which plane of existence they are fighting on. Damage seems to be the same across all planes.


  • HD: ~35-40hp (9+22+10 25kills)(11+2+3+11 Quarter left 29kills)(8+7+6+21kills)
  • AC: 22
  • Atk: +10 (Ranged Attack ?ft), +?(Claw), +?(Bite)
  • Damage: Ranged: 1d4, Claw: ?, Bite: ?.
  • Ability: Ranged and Bite cause 1d4 poison damage every 2mins 3 times with a failed save vs poison or Con save. ToS used save vs poison. HoBo has used Con saves.
  • Movement: 12
  • Experience: ?


  • HD: ?
  • AC: ?
  • Atk: ?
  • Damage: 1d4

Hydras do not have any fire resistance.