Adult Loch Ness Monster

Water Stealth. The monster has impeccable stealth in water terrain, and can essentially appear and disappear very quickly.

Hold Breath. The monster can hold its breath for 1 hour.

Freeze. If the monster takes cold damage, it partially freezes; its speed is reduced by 20 feet until the end of its next turn. 

Paralyze. If the monster takes lightning damage, it becomes paralyzed until its next turn. It can not attack, but it can move up to 15 ft.

Water Skin. The monster is immune to fire damage. When struck with fire damage steam rolls off of its skin.

Multiattack. The monster makes two slam attacks.

Slam. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 3) bludgeoning damage.

Bite. Melee Weapon Attack: +4 to hit, reach 15 ft., one target. Hit: 16 (3d6 + 5) burning damage.

Scorching Spray. Ranged Weapon Attack: +6 to hit, reach 15 ft., cone. Hit: 22 (3d8 + 3) piercing damage.

Head Whip. Reaction: Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 12 (2d8) bludgeoning damage.