Broken Vessel (HK)

Corrupt Endurance. Broken Vessel does not need to eat, sleep or drink.

Lifeseed. Broken Vessel is fuled by the Infection Lifeseeds stuck to its shell - if those are removed, it returns to its harmless state.

Only Companions. When below a quater of its hit points (41, rounded down), Broken Vessel can spawn an Infected Balloon within 20 ft. of itself as a bonus action. The Balloon has 1 hit point, an AC of 13, a flying speed of 20 ft. and can headbutt as an action, dealing 4 (1d4 + 1) poison damage. Balloons take their turns immediatly after Broken Vessel and there can only exist a maximum of three Balloons at once.

Multiattack. Broken Vessel makes four nail attacks.

Nail. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 9 (1d10 + 3) slashing damage. 

Infectious Slam. Broken Vessel leaps to an unoccupied space within 20 ft. without provoking attacks of opportunity. He then slams dow, unleashing four infectious orbs. Up to four creatures within 5 ft. of the Vessel have to make a DC 12 dexterity save or take 14 (3d8) poison damage. When more then four creatures are within 5 ft., Broken Vessel can choose four creatures to target.

Cascade (1/day). Broken Vessel reduces its walking speed to 0, gains 30 temporary hit points and continually fires infectious orbs at up to three targets within 30 ft., forcing them to make a dexterity saving throw (DC 13). Targets take 15 (6d4) poison damage on a failed save or half as much on a success. Broken Vessel can continue to use Cascade until he uses his action on anything else. Once it used Cascade, dealing 45 or more damage to Broken Vessel between two of it’s turns causes it to fall prone and prevents it from using Cascade on his next turn.