Vam'texiak

Necrotic Shroud. Whenever Vam'texiak takes necrotic damage, the damage is nullified and he gains temporary HP equal to half the damage dealt.

Umbral Sight. Vam'texiak has darkvision up to 150 ft.; this darkvision pierces through both magical and nonmagical darkness.

Spellcasting. Vam'texiak is a 14th-level Wizard. Its spellcasting ability is Intelligence (spell save DC 20, +12 to hit with spell attacks). Vam'texiak has the following Wizard spells prepared:
Cantrips (at will): Minor Illusion, Control Flames, Chill Touch, Fire Bolt, Ray of Frost
1st level (4 slots): Mage Armor, Shield, Witchbolt, Absorb Elements,
2nd level (3 slots): Aganazzar's Scorcher, Blur, Mirror Image, Darkness, Invisibility, Maximillian's Earthen Grasp
3rd level (3 slots): Fear, Hypnotic Pattern, Fireball, Counterspell
4th level (3 slots): Fire Shield, Phantasmal Killer, Summon Elemental
5th level (2 slots): Enervation, Immolation
6th level (1 slot): Chain Lightning, Mental Prison
7th level (1 slot): N/A

Cast a Spell. Vam'texiak uses his action to cast one of his prepared spells.

Shield. Vam'texiak uses his reaction to cast Shield.

Absorb Elements. Vam'texiak uses his reaction to cast Absorb Elements.

Counterspell. Vam'texiak uses his reaction to cast Counterspell.