Blizzard Spirit

Snow Fall Aura: An area of 30ft radius centered on the Blizzard Spirit is permanently filled with falling snow and hail, that area counts as ligtly obscured area and dificult terrain fo creatures other than the Blizzard Spirit, ranged attacks made agaisnt the Blizard Spirit are made with disadvantage. (The Blizzard Spirit can choose for allies not to be affected by the effects of this feature.)

Inate Spellcasting: The Blizzard Spirit has the inate capacity to comand snow and ice, it being shown as its ability to cast the following spells with a spell save DC of 12 and a spell attack bonus of +4.

Cantrips (Frostbite, Ray of Frost) 

4 1st level (Ice Knife, Fog Cloud, Create or Destroy Water)

3 2nd level (Rime´s Binding Ice, Mirror Image)

1 3rd level (Sleet Storm)

Shape Change: The Blizzard Spirit cab as an action become a mist of snow and hail, while in this forms they cant be restrained grappled or fall prone, additionaly they have resistance to all damage types other than force damage.

If the Blizzard Spirit takes fire damage while in mist form it must use its reaction to return back to normal.

The Blizzard Spirit cannot perform any action but moving while shape as a mist of snow and hail, it can resume to its phisical form as an action.

Elemental Nature: The Blizzard Spirit is considered both an elemental and an undead for effects that would recall for either creature type.

Chilling Touch: +4 to hit, 5ft reach, one target for 2d6+2 cold damage a creature hit by this attack must succeed in a DC 12 Constitution saving throw having its movement speed reduced by 10ft until the end of their next turn.

Conjure Blizzard (Recharge 5-6): The Blizzard Spirit expands its Snow Fall Aura by an additional 30ft all creatures within the Snow Fall Aura reach other than creatures chosen by the  Blizzard Spirit must succeed in a DC 12 Constitution saving throw taking 6d6 cold damage and falling prone on a failure, half as much damage on a success and no addiitonal effects.

The Snow Fall Aura size returns to normal after the effect resolves.