Name: Niseag
Huge beast, unaligned
Armor Class: 18 (natural armor)
Hit Points: 350 (28d12 + 168)
Speed: Swim 60 ft.

STR: 26 (+8)
DEX: 14 (+2)
CON: 22 (+6)
INT: 8 (-1)
WIS: 12 (+1)
CHA: 10 (+0)

Skills: Perception +6
Senses: darkvision 60 ft., passive Perception 16
Languages: understands Draconic but can't speak
Challenge: 18 (20,000 XP)

        Amphibious. The Niseag  can breathe both air and water.
        Keen Smell. The Niseag  has advantage on Wisdom (Perception) checks that rely on smell.

Actions
        Multiattack. The Niseag  can use its Frightful Presence. It then makes three attacks: one with its bite and two with its tail.
        Bite. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 32 (4d12 + 8) piercing damage.
        Tail. Melee Weapon Attack: +14 to hit, reach 20 ft., one target. Hit: 24 (4d8 + 8) bludgeoning damage.
        Frightful Presence. Each creature of the Niseag 's choice within 120 feet of it and aware of it must succeed on a DC 18 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the Niseag 's Frightful Presence for the next 24 hours.

Description: The legend of the Niseag  has captured the imagination of millions of people worldwide. For centuries, eyewitnesses have reported sightings of a large, mysterious creature living in the depths of Loch Ness, a freshwater loch in the Scottish Highlands. Despite the numerous accounts, no concrete evidence has been found to prove the existence of the Niseag.

Appearance
The physical appearance of the Niseag  is one of the most discussed and debated aspects of the creature. According to eyewitness accounts, the creature is described as being long and serpentine, with a hump-like feature protruding from the water. It is typically dark in color and has a smooth, scaly texture. Some accounts suggest that it has a horse-like head, while others describe it as having a reptilian appearance.

Despite the numerous sightings, no physical evidence has ever been found to support the existence of the creature. No remains or carcasses have ever been recovered, and no conclusive photographs or video footage have been recorded. Some skeptics suggest that the sightings are merely misidentifications of known animals, such as large fish or otters. Others propose that the Niseag  is a complete fabrication, a myth created to attract tourists to the area.

Behavior
Eyewitness accounts of the Niseag  describe the creature as being relatively calm and peaceful, swimming slowly through the waters of the loch. However, some reports suggest that it can move quickly, creating large waves and wakes as it moves through the water. It is typically described as being solitary, with no evidence of any other creatures living in the loch.