Avala the Ancient Frost

Absorb: if near her conjured frost companions can absorb its life force either healing or gaining  3d8 temporary hit points based off of current hit points. 

Spellcasting. The [monster name] is a 6th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 15, +4 to hit with spell attacks). The Avala The Ancient Frost has following spells prepared:
Cantrips (at will): [Ice Knife], [Armour Of Agathys],[Wall of Ice]
5th level (3 Times a day): [Frostbite], [Cone Of Cold]

Summon:  Once Per battle Avala can summon 1d12 + 3 frost companions these can take on the shape of any creature equal or smaller than medium it takes on all aspects of the creature besides hit points which are all 4d12 + 20

Glaive: +7 to hit, reach 10 ft., 1 target. Hit: 21 (3d8 + 6)  slashing damage.

Throwing Knife:  +5 to hit, range 35/70 ft., 3 target. Hit: 12 (2d8 + 2) piercing damage.

Double Take. If near enemy hit with throwing knife this turn Avala can tear it out causing an extra 1d6 +2 slashing damage

 Cryonetic Protection: Avala can solidify an area of her body into ice reducing damage by 1d12 +4 

Legendary Action: Wrathborn Requiem

(Costs 2 Legendary Actions, Requires Wrath Unleashed)

The BBEG slams the glaive into the ground, causing crimson cracks to splinter outward. From these fissures, ethereal chains wreathed in blood-red fire lash out, seizing anything in their path. The glaive only grants this power when its wielder has suffered enough to invoke the god’s wrath.

• Prerequisite – Wrath Unleashed: The BBEG can only use this action if it has taken at least 50 damage since the end of its last turn.

• Creatures in a 15-foot radius must make a DC (8 + proficiency + STR/CHA modifier) Dexterity saving throw as the ground erupts.

  • On a failed save, they take 6d10 force damage, are knocked prone, and restrained by spectral chains until the end of their next turn.
  • On a successful save, they take half damage and avoid being restrained.

• Structures and objects in the area take double damage, as the glaive’s wrath is indiscriminate.

After using this action, the BBEG cannot use Wrathborn Requiem again until the end of its next turn.

Visual Effects & Flavor

• The cracks glow like molten veins before the chains burst out.
• The chains appear ghostly and echo with distorted screams of past victims.
• When the chains fade, they dissolve into embers, leaving behind scorched ground.

Icy Gaze. Once Per turn Avala can stare through an enemy's soul with her frosted eyes instilling them with a fear that causes the enemy to to deal 1/2 damage until Avala's next turn. It requires a constitution saving throw dc 23