Ice Warrior, Updated

You are a warrior of ice empowering your attacks with cold and mixing magic into your fighting style.

Ice Blade

When you attack with a metal weapon the blades temperature drops to below -30 degrees. The target takes a extra 1d10 cold damage. This damage goes up as you level up 7th level (2d10) 11th level (3d10) 17th level (4d10)

Built For Cold

You gain resistance to cold damage. This resistance becomes immunity at 10th level.

Ice Teleportation

You can teleport up to 15 feet while in cold terrain and weather as a bonus action.

Blast Of Cold

At 10th level you can cast CONE OF COLD once per long rest. Your save equals 8 + your proficiency bonus + your strength modifier.

Cold Environment

At 15th level you can use a action to make a 40 foot sphere centered on you. While in the sphere creatures other than you in the sphere treat the area as difficult terrain and on the start of their turn they take 2d10 cold damage. This damage ignores resistance to cold damage but not immunity. This last for 10 minuets. You can't use this feature agin until you finish a long rest.

Ice Spikes

At 18th level you can summon six ice spikes 15 feet around and 45 feet tall. Each creature within 15 feet of one must make a dexterity saving throw or take 6d10 on a failed save or half as much on a successful one. A creature that is large or smaller is stuck on one 45 feet in the air. Your save equals 8 + your proficiency bonus + your strength modifier.