Balmuros, the Titan of Bliss

Aura of Serenity. Creatures within 30 ft. of the Titan of Bliss must succeed a DC 18 Charisma saving throw at the start of their turn or have disadvantage on attack rolls until the start of their next turn. Creatures immune to charm are immune to this aura.

Joyous Resistance. Whenever the Titan of Bliss would be affected by a condition, roll a d6. On a 5 or 6, the condition is ignored as bliss shields his mind.

Legendary Resistance (4/Day). If the Titan of Bliss fails a saving throw, he can choose to succeed instead.

Divine Stillness (1/Day). When reduced to 0 hit points, the Titan of Bliss lets out a wave of euphoric stillness. He is restored to 150 hit points, and all enemies within 60 feet must make a DC 18 Wisdom saving throw or become charmed and incapacitated until his next turn. While in this state, the Titan of Bliss floats in a meditative posture and regains 30 hit points at the start of each of his turns for 1 minute.

Multiattack. The Titan of Bliss makes two Bliss Palm attacks.

Bliss Palm. Melee Weapon Attack: +14 to hit, reach 15 ft., one target.
Hit: 21 (3d10 + 5) force damage. The target must succeed on a DC 18 Wisdom saving throw or be charmed until the end of their next turn.

Euphoric Breath (Recharge 5–6). The Titan of Bliss exhales a wave of rose-gold mist in a 60-foot cone. Creatures in that area must make a DC 18 Charisma saving throw. On a failed save, they fall prone and are incapacitated with joy (they giggle uncontrollably) until the end of their next turn. On a success, they take 33 (6d10) radiant damage and suffer no other effect.

Cradle of Peace (2/Day). The Titan of Bliss causes an aura of divine calm in a 60-foot Emanation. Hostile creatures must succeed on a DC 18 Wisdom saving throw or be affected by the calm emotions spell for 1 minute. While this aura persists, the Titan of Bliss and any ally within it regain 10 hit points at the start of their turns.

Legendary Action Uses: 2. Immediately after another creature’s turn, the Titan of Destruction can expend a use to take one of the following actions. The Titan of Destruction regains all expended uses at the start of each of its turns.

Laugh of the Eternal. The Titan of Bliss chuckles serenely. One creature within 30 feet must succeed on a DC 18 Charisma saving throw or fall prone in helpless laughter.

Shimmering Pulse. The Titan of Bliss emits a pulse of soothing energy. All allies within 30 feet regain 15 hit points and remove one condition affecting them.

Smile of Infinity. The Titan of Bliss opens his eyes slightly. One creature he can see within 120 feet must make a DC 18 Wisdom saving throw or be stunned until the end of their next turn. On a successful save, the creature cannot be affected by this ability again for 24 hours.