Fossergrim

Fossergrims were solitary fey that were mystically bound to waterfalls.

Description
Fossergrims resembled handsome human males with long white hair, blue-tinged white beards, and piercing blue eyes. They typically wore beautiful, fine-quality chain mail, and weapons, and nice clothing and exquisite silver jewelry.

Personality
Fossergrims were reclusive fey, each bound to a waterfall in the same way as a dryad was bound to a tree. They would not bother people who came to their waterfall to simply bathe or drink; however, fossergrims were merciless in fighting people who polluted their waterfall or dammed the river that fed it.

Fossergrims were willing to speak with and even assist other creatures, so long as those other creatures were polite and did nothing to harm the waterfall.

Abilities
Fossergrim possessed several magical abilities, some of which only worked while they were in their waterfall or the waterfall's splash zone. For instance, they were difficult to see and target while within the waterfall, and while fighting an opponent within the waterfall they always had the advantage. While within the waterfall or the splash zone, fossergrim healed remarkably fast and were resistant to spells. They had low-light vision.

Fossergrim fought using longspears and longbows.

Fossergrim were aquatic fey that swam as easily as they walked.

Society
Fossergrim were solitary fey with a neutral outlook on life. They were unable to go more than from their waterfall; doing so resulted in them falling ill and dying within 24 hours.

Although fossergrim had no need for shelter, they would create comfortable, well-appointed lairs in the caves behind their waterfall.

If the waterfall froze during the winter, the fossergrim would fall into a deep torpor inside the icy cascade. However, they remained aware during this time and would awaken to protect the waterfall if necessary.

Some legends spoke of fossergrim seducing young maidens who came to bathe or wash clothing by their waterfall. The mating of a human and fossergrim, in the legends, always produced another fossergrim, who appeared as a normal human until reaching adulthood, at which time they sought out a waterfall of their own.

Fossergrim could be summoned by spellcasters using the summon nature's ally V spell.