Ashspawn Sprite Destroyer

Executioner's Mark. Targets hit by the sprite take an extra 10 (3d6) Necrotic damage and cannot benefit from Advantage on saves versus its abilities.

Aura of Withering Order (15 ft.). The sprite emits a withering aura in a 15-foot radius. Living creatures in the aura lose resistance to necrotic damage and their healing is reduced to 0 while bloodied (below half Hit Points).

Unerring Hunter. The sprite ignores Disadvantage on ranged attacks and partial cover.

Multiattack. The sprite makes two Ash Longbow attacks.

Ash Longbow. Ranged Attack Roll: +9, range 40/160 ft. Hit: 9 (1d6 + 5) Piercing damage plus 14 (4d6) Necrotic damage and the target must succeed on a DC 16 Constitution save or become Weakened and suffer Disadvantage on attack rolls until the end of their next turn.

Annihilating Volley (Recharge 5-6). As an action, the sprite chooses 3 creatures within 40 feet. Each creature must make a DC 16 Dexterity save or take 21 (6d6) Necrotic damage, or half as much on a save.

Death Thorn Arrow (1/day). Ranged Attack Roll: +9, range 40/160 ft. Hit: The target must succeed on a DC 16 Constitution save or take 35 (10d6) Necrotic damage and be unable to regain Hit Points for 1 minute. The creature takes half damage and can regain Hit Points on a successful save.

Spellcasting. The sprite casts one of the following spells, requiring no Material components and using Wisdom as the spellcasting ability (spell save DC 13):

At Will: Detect Magic, Minor Illusion
2/Day Each: Invisibility (self only), Entangle

Fade Into Cinders (Recharge 4-6). When hit, the sprite becomes briefly incorporeal, reducing damage by half and teleporting up to 20 ft.