Blood Frenzy. The Viper Mercurial has advantage on melee attack rolls against any creature that doesn't have all its hit points.
Saltwater Breathing. The Viper Mercurial can breathe only saltwater.
Poisonous. If the Viper Mercurial is eaten without the removal of the venom gland the consumer must make a DC 10 Constitution saving throw, taking 5 (2d4) poison damage and becomes poisoned on a failed save, or half as much damage on a successful one.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 1 piercing damage, and the target must make a DC 10 Constitution saving throw, taking 5 (2d4) poison damage and becomes poisoned on a failed save, or half as much damage on a successful one.
Nimble Escape. The Viper Mercurial can take the Disengage or Hide action as a bonus action.
Description
The Viper Mercurial or "Assassin Fish" is a carnivorous fish with sharp teeth and a poisonous bite. Viper Mercurial is most commonly found in reefs and other warm water environments, however they tend to form swarms when in more open waters; a school of Viper mercurial is called a "Guild".
(This is not originally my idea; the original concept for this is from AVNJ's second invent a fish stream highlights, and is by EekyBleeky)







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