Vixen of Desolation

Mist of Desolation. Concentration 60ft. 30ft non concentration. Mist goes around corners. Each creature within the mist at the end of their turn, must make a CHA saving throw or take 1 point of Desolation. 
For each point of Desolation a creature has, a new status effect is added.
A creature can remove points of desolation with a restoration spell or 24hrs of rest per point.

1- Sleep
2- Blinded
3- Poisoned
4- Deafened
5- Petrified
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It comes from the Mist. While its entire body is in mist, its AC and Saving Throws go up by +4.

Spellcasting. The [Vixen] is a 3rd-level spellcaster. Its spellcasting ability is [CHA] (spell save DC 16, +8 to hit with spell attacks). The [Vixen has following spells prepared:
Cantrips (at will): [spell name], [spell name] 
Magic Missile (At will), Pass without a Trace (x2 a day), Hallucinatory Terrain (x1 a day)

Vixens Attacks. Vixen makes one attack per round.

Life Drain Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 8 (1d4 + 5) [Piercing] damage, and an additional (1d8) [poison] damage which is converted to HP for the Vixen.

Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 8 (3d4 + 5) [Slashing] damage. Targets are moved 5ft back.

Tail Swipe. Melee Weapon Attack: +7 to hit, reach 10 ft., 2 target. Hit: 11 (3d6 + 5) [Bludgeoning] damage. DC 12 CON Save or stunned until the end of next turn.

Enter the description for how bonus actions work for your monster here.

The Vixen can take the hide Action as a Bonus Action.

Side Swipe. When a hostile creature within 5ft of the Vixen makes a melee attack and misses. The Vixen can make a follow up attack with its Claws or Tail.

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In the midst (Costs 1 Action). Can misty step within any grouping of mist that can obscure the entirety of the Vixen.

Retaliation (Costs 1 Action). The Vixen combusts a 5ft space within the range of his Mist. Each creature must succeed a DEX Save DC 16 or take 1d6 Fire damage.

Glimmer (Costs 1 Action). AC +2 until the start of next turn.

Tail Pulse (Costs 2 Actions). Extend the reach of the Desolation Mist by 10ft. This feature, unless interrupted by a gust spell or something similar, remains for 1 minute.

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Mythic Action Name (Costs # Actions). Enter the description for your mythic action.