The Witcher Bestiary - Vodyanoi Warrior
Vodyanoi Warrior Occurrence: They come ashore to protect their underwater domains or to raid human settlements.

Immunity: Resistant to incineration attempts.

Susceptibility: Once set alight, they prove sensitive to fire; susceptible to blinding.

Tactics: They grease their claws with oil which causes pain and are often supported by priests.

Alchemy: Vodyanoi bladders and scales, tendons.

The sight of vodyanoi warriors striding ashore is a sign that a transgression has been committed against the fishpeople - either the border to an underwater kingdom has been crossed or a taboo under one of the many vodyanoi religions has been violated. The warriors' primary duty is to guard the underwater kingdom, though when necessary they leave their domain to seek justice for some perceived harm. Both tasks are performed with precision and emotionlessly. They do not hesitate to sacrifice their lives in service to the powers of the Deep.