Animosity

Broken Heart. Animosity keeps half of its heart caged, while its caged animosity is immune to being charmed or frightened. The cage is not indestructible however, if animosity drops to 0 hit points it will burst with furious anger dealing 10 (2d10) psychic damage before healing up to full. The cage can be destroyed by either dealing a killing blow with radiant damage or if it is talked to with a successful DC 18 Charisma (Persuasion) check, if the cage is to be broken the animosity will be destroyed instantly. 

Tether of Anger. When a hostile creature is within 30 feet of animosity, it must succeed a DC 16 Wisdom saving throw, on a failure the creature becomes tethered to animosity, becoming a thrall of it. The creature will do and follow the commands of animosity until it succeeds a DC 16 Wisdom saving throw at the end of its turn or if the creature is knocked unconsious.

Heart Ache. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 19 (3d10 + 4) bludgeoning damage and 9 (3d6) psychic damage. 

Anger Point. Ranged Weapon Attack: +7 to hit, range 10/20 ft., 1 target. Hit: 10 (2d8 + 3) psychic damage. On a hit, a creature must make a DC 15 Charisma saving throw, on a failure the creature is stunned with an anger-induced headache until the end of its next turn.