Wendilor

Regeneration. The wendilor regains 10 hit points at the start of each of its turns. The wendilor dies only if it starts its turn with 0 hit points and doesn’t regenerate.

Blood Frenzy. The wendilor has advantage on attack rolls against a creature that doesn’t have all its hit points

Sword and Teeth Coat. When a creature lands a successful attack on the Wendilor, that creature takes 6 piercing damage from the sharp blades and many jaws on the wendilor's hide.

Multiattack. The wendilor makes one Bite attack and two Claw attacks, or two Tail Swipe attacks.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 29 (3d12 + 4) piercing damage. If the target is Medium or smaller, the target must succeed on a DC 18 Strength saving throw or be thrown 20 ft. in a random direction and be knocked prone.

Claw. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 13 (2d8 + 4) slashing damage, plus 10 (3d6) slashing damage if the target is prone.

Tail Swipe. Melee Weapon Attack: +8 to hit, reach 10 ft. radius. Hit: 22 (3d10 + 4) bludgeoning damage +6 slashing damage.  If the target is Medium or smaller, the target must succeed on a DC 18 Dexterity saving throw of be pushed back 10 ft.

Haunting Roar. The wendilor lets out a haunting roar that echos throughout the forest. Every creature within 100 ft. must make a DC 20 Wisdom saving throw or be Frightened. 

Many Jaws. The wendilor can make a bite attack with the small jaws on its back. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 4) piercing damage.