Frozen Heart Sorcerer

Your innate magic comes from the primordial power of winter. Many with this power can trace their magic back to ancestors from the frozen wastes, but perhaps you were born during a howling blizzard so powerful that folk still tell stories of it, or your lineage might include the influence of potent air creatures such as djinn. Whatever the case, the magic of the north permeates your being.

Rough Skin

While you are not wearing any armor, your Armor Class equals 13 + your Constitution modifier. You can use a shield and still gain this benefit.

Cryogenic absorb

Whenever you deal cold damage with a spell, you gain temporary hit points equal to twice your Charisma modifier.

Ice tomb

When you cast a spell of first level or higher that deals cold damage, you can spend 2 sorcery points per creature only if you hit them with the spell to foce them to make a constitution saving throw against your spell DC, on a failed save the creatures affected with this feature is incapacitated and their speed became 0 until the start of your next turn. A creature that is no longer incapacitated from this source take half the damage of the spell casted.

If the affected creature takes fire damage while incapacitated, it is no longer incapacitated and doesn't take the extra damage from this feature.

One with the snow

You gain resistance to cold damage.

Snow Drift

Starting 14th level, as an action, you can emanate surroundings with billowing winds and sheer cold at 15 feet of you in every direction, but not through total cover, this aura is difficult terrain and last 1 minute. You can freeze water as you come near to it, creating difficult terrain that you can walk across.
As an action when this aura is active, you can create ice structures within the range of Snow Drift , ranging from a block of ice to a staircase of ice.
When a creature moves into the area for the first time on a turn or starts its turn there that creature must succeed on a Constitution saving throw against you spell DC or take twice your charisma modifier of cold damage.
You are not affected by this aura.
Once you use this feature, you can't do so again until you finish a long rest or until you expend 5 sorcery points.

Blizzard

At 18th level, you gain the ability to harness the blessing of the Mother Winter. As an action you can magically become an avatar of the winter, emanating from you an 60 feet radius aura as the form of a blizzard and last 1 minute having the following properties:

- The aura is considered as a difficult terrain.
- Creature's sight beyond 10 ft inside the aura is blocked by the blizzard.
- The aura heavy snowing and strong winds makes the area count as heavily obscured for any creature trying to perceive what's inside.

When you use this feature you can designate any number of creatures you can see to be unaffected by it.
Once you use this feature, you can't use it again until you finish a long rest.