Canine Werebeast

Legendary Resistance (3/Day). If the Werebeast fails a saving throw, it can choose to succeed instead.

 Bloodlust. When the beast is below half it's maximum Hit Points it enters Bloodlust. At the start of it's turn it regains 10 Hit Points and it's AC is increase by 2. 

Keen hearing. The creature has advantage on perception that rely on hearing.

Supirior Strengh. The werebeast can throw a creature of Medium or smaller size  it has grappled 10 ft far away the creature will then be prone. (No action required.)

Multiattack. The Werebeast makes two attacks: one with its bite and one with its tail or two with it's claws.

Claws. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 7 (2d4 + 4) slashing damage.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage.

Tail. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 8 (1d8 + 4) bludgeoning damage. If the target is a creature, it must succeed on a DC 15 Strength saving throw or be knocked prone.

Frightful Howl (1/Day When in Bloodlust). Each creature of the Werebeasts choice that is within 120 feet of the dragon and aware of it must succeed on a DC 13 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 Frightful Howl for the next 24 hours.

Call Reinforcement (Recharge 5–6). The Werebeast cries out a into the night calling (1d4) [Montster]Dire Wolf[/Monster] as Reinforcements.

Retaliation. The Werebeast  attempts to grapple a creature that just hit it.

The Werebeast can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The Werebeast regains spent legendary actions at the start of its turn.

Detect. The Werebeast makes a Wisdom (Perception) check.

Lunge. The Werebeast moves up to half its speed and attempts to grapple a creature.

Tail. The Werebeast makes a Tail attack.