Blood-starved Beast

Bloodlust- As the blood-starved beast starts to taste its own blood, it will enter into a greater frenzy, becoming faster and stronger. When the blood-starved beast is reduced to 2/3 of its maximum hit points, it can move an additional 10 feet of movement, and make one additional claw attack. 

Poison Aura- When the blood-starved beast is reduced by 1/3 of its maximum hit points, it will begin releasing a poisonous mist around it. Any creature that begins its turn within 10 ft. of the beast or enters within 10 ft. of it must make a DC 13 Constitution saving throw or take 2d6 poison damage and you they become poisoned. A poisoned creature can make a second Constitution saving throw on the beginning of their turn. On a failed save, the poisoned creature takes 1d6 poison damage at the beginning of each turn for one minute. A creature that is currently poisoned may not be poisoned again. 

Poison-tipped Claws- When a target is hit by the blood-starved beast, it musty succeed a DC 10 Constitution saving throw or be poisoned. A poisoned creature can make a second constitution saving throw on the beginning of their next turn. On a failed save, the poisoned creature takes 1d6 poison damage on the beginning of each of their turns for one minute. A creature that is currently poisoned may not be poisoned again. 

Multiattack- The blood-starved beast makes two attacks with its claws. 

Claw- Melee Weapon Attack: +6 to hit, reach 10 ft., Hit: 2d6+3 slashing damage.

Feral Lunge- The blood-starved beast ravenously lunges at a target within 30 ft., landing in any open space next to it. The target must succeed on a DC 15 Dexterity saving throw or take 4d6+3 slashing damage.