Wrylaskia

Gate Keepers Aura. Any creature that starts its turn within 10 feet of the Wrylaskia must make a DC 15 Wisdom saving throw. On a successful save, the creature is immune to this aura for the next 24 hours. On a failed save, the creature has disadvantage on saving throws and its speed is halved until the start of its next turn.

Undead Fortitude. If damage reduces the Wrylaskia to 0 hit points, it must make a Constitution saving throw with a DC equal to 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the Wrylaskia drops to 1 hit point instead.

Vigilant. The Wrylaskia cannot be surprised

Spellcasting. The Wrylaskia casts one of the following spells, using Charisma as the spell casting ability (spell save dc17):

At will: dissonant whispers, faerie fire, gift of alacrity

2/day each: hold person, hypnotic pattern, silvery barbs, guiding bolt, silence, haste

1/day each: dominate person, mass cure wounds, mass suggestion, create undead, geas

Multiattack. The Wrylaskia can make two Death Choir attacks.

Death Choir. Ranged Spell Attack: +9 to hit, range 120 ft., one target. Hit: 16 (2d10 + 5) necrotic damage. Unless the target is immune to necrotic damage, its Charisma score is reduced by 1d4. The target dies if this reduces its Intelligence to 0. Otherwise, the reduction last until the target finishes a short or long rest.

Unified Choir (Recharge 4-6). After the Wrylaskia or a creature it can see within 30 feet of it takes damage, the Wrylaskia creates a barrier around itself or the other creature. While the barrier is active the creature gains 27 (5d8 + 5) temporary hp and restore 27 (5d10) at the start of its turn. When the creatures temporary hp reaches 0 the barrier disperses.