Avashtana Perantasil

Magic Resistance. The archmage has advantage on saving throws against spells and other magical effects.

Spellcasting. The archmage is an 18th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 18, +10 to hit with spell attacks). The archmage can cast disguise self and invisibility at will and has the following wizard spells prepared:

Cantrips (at will): fire bolt, light, mage hand, prestidigitation, shocking grasp

1st level (4 slots): shield, mage armor*, magic missile

2nd level (3 slots): dragon's breath, mirror image, hold person

3rd level (3 slots): counterspell, dispel magic, lightning bolt, fireball, [Tooltip Not Found]

4th level (3 slots): black tentacles, watery sphere, stoneskin*

5th level (3 slots): cone of cold, dominate person, wall of force

6th level (1 slot): globe of invulnerability

7th level (1 slot): teleport

8th level (1 slot): feeblemind*

9th level (1 slot): meteor swarm

*The archmage casts these spells on itself before combat.

This Creature has a duel-initiative at half it's rolled initiative. 

Spear. Melee or Ranged Weapon Attack: +12 to hit, reach 5 ft. or range 60/80 ft., one target. Hit: 10 [rollable](1d10 + 10)

The Spear Casts Lightning Bolt on a hit.

Avashtana has a pool of (3) Legendary Actions Points she may spend to perform certain actions at the end of a players turn. This pool is refreshed during her turn in combat.

Wrath of Talos (2 Action Points): Each Creature Avashtana can see must succeed a DC: 18 Dexterity Saving Throw or suffer the effects of Lightning Bolt at 6th Level. (11d6 Lightning Damage) 

Chosen of Talos (1 Action Point): Avashtana may throw and recall her spear. Target suffers the effects of lightning bolt on hit or recall; when in the path of the spear. Target automatically fails the save for lightning bolt if the spear is currently imbedded in their body. Creatures hit by the spear when it is thrown may use an action to remove it.

Grasp of Talos (1 Action Point):  Avashtana urges the sea to claim a person she can see. The target must succeed a DC: 18 Constitution Saving Throw or be Drowning, Silenced, Restrained and Incapacitated. The Target can repeat this save at the start of each of it's turns. Only one target can suffer from it's effects at a time.