Frozen Blood

Up in the north a line of sorcerers was said to have frozen blood running through their veins. Not only did they master spells of frost, but they also learned how to conjure freezing blue flames. Merging the versatility of ice with the destructive power of fire, these casters are not to mess with.

Cold Adaptability

At 1st level, you are adapted to cold climates. Moving through difficult terrain caused by ice or snow costs you no extra movement.

Frost Fire

At 1st level you learn the secret of frost fire. When you cast a spell that deals fire damage, you can have it deal cold damage instead.

Frost Magic

When you cast a spell of 1st level or higher, motes of frost float around you. You gain a number of motes equal to the level of the spell slot used up to a maximum of your Charisma modifier (minimum 1). You can use these motes for offence or defence channelling them into your frost magic feature. Any unspent motes disappear after one minute.

 You can expend frost motes to generate one of the following effects.

Frost Missiles

As a bonus action, you can expend charges to create one frost missile for each mote spent. Each missile hits a creature of your choice that you can see within range. A missile deals 1d4 + 1 cold damage to its target. The missiles all strike simultaneously, and you can direct them to hit one creature or several.

Shielded by the cold

As a bonus action, you can expend motes to gain temporary hit points. The amount is 1d4+1 per mote spent and they last for one minute.

Heart of Frost

At 6th level, you gain resistance to cold damage.

Aura of Cold

At 14th level, you can choose to be surrounded by an aura of cold. Creatures that start their turn or come within 10 feet of you have their speed reduced by 10 feet. As an action, you can expend 3 sorcery points to unleash a flurry of ice causing all creatures within your aura to have disadvantage on their weapon attack rolls until the start of your next turn.

Might of the frozen North

At 18th level, you gain immunity to cold damage. In addition, your frost spells also freeze your enemies in their tracks. When a creature fails a saving throw against a spell of 1st level or higher that deals cold damage, they are restrained until the start of your next turn.