Rimeblade

Rimeblades are an obscure breed of rogue, adventurers who are imbued with the icy touch of winter. Some may have narrowly survived a frozen fate, while others may have been touched by snow-spirits or cursed while robbing a glacial tomb. They still practice their rogueish arts, but are able to summon blades of ice or conjure waves of frost to prepare their foes for a deadly strike.

Rimeblades may be from any alignment or background, though something in their history will tie them to wintry powers. Once they walk the path of the Rimeblade however, they may lean towards evil, or at least selfishness - picks and knives that melt at a touch are an easy way to avoid leaving evidence, after all. Good-aligned Rimeblades may be investigators or treasure hunters, while evil Rimeblades make excellent assassins.

Crystal Blades

3rd-level  Rimeblade feature

When you choose this archetype at 3rd level, you are able to summon a dagger of solid ice. It functions as a normal dagger in all respects, but does 1d4 piercing and 1d4 cold damage on a hit. When you deal Sneak Attack damage with it, you may turn that damage into cold damage. It melts 1 minute after it leaves your hand.

 You may also coat an existing weapon with ice, allowing it to function as an ice dagger for purposes of your other abilities.

Biting Cold

Shattering burst

9th-level Rimeblade feature

Starting at 9th level, your frost magic is more powerful. When you use your Crystal Burst ability, you may send a shard of ice flying off to strike another creature within 30 feet. Make a ranged spell attack against that creature. On a hit, they take cold damage equal to half of one roll of your Sneak Attack dice.

You can use your Shattering Burst a number of times equal to your proficiency modifier, regaining all uses after a long rest.

 

Wintry Wanderer

Also at 9th level, you gain resistance to cold damage, and you have advantage on Dexterity (Stealth) checks when attempting to hide on ice or snow.

Snap Freeze

13th-level Rimeblade feature

At 13th level, you learn a new, defensive use for your frost magic. As a reaction before an enemy attempts a melee attack against you, you can immediately summon a column of ice to encase the attacker. They must make a Dexterity saving throw, or they are restrained until the end of their next turn.

You can attempt to freeze a creature in this way a number of times equal to your Intelligence modifier, regaining all uses after completing a long rest.

 

Winter's Breath

17th-level Rimeblade feature

At 17th level, your frozen blades embody the very heart of winter. When you hit an enemy with your ice dagger and deal Sneak Attack damage, you may cast cone of cold as part of the same action, originating at that enemy and directed away from you.

You may cast cone of cold in this way once, regaining its use after a short rest.