An'ferthe

An'ferthe is a sliver long sword with no quillion and an icy blue blade. 

Dormant State

• The wielder has +1 to attack and damage rolls and deals an additional 1d4 cold damage on a hit.
• An'ferthe has 4 charges and regains 1d4 expended charges daily at dawn.
• As a reaction, the wielder can expend 2 charges to gain 5 temporary hit points, hardening their body with ice to lessen damage.
• When the wielder hits with this weapon, they can choose to expend any number of charges from it, dealing an additional 1d6 cold damage per charge expended, which is inflicted on the target of that attack.

Awakened State

• The wielder has +2 to attack and damage rolls and the additional cold damage on a hit becomes 2d4. 
• An'ferthe grants the wielder resistance to fire damage.
• The sword's maximum charges becomes 10, and it regains 1d4+2 charges daily at dawn.
• When the wielder hits with this weapon, they can choose to expend 6 charges from it, freezing the target and paralyzing them until the end of their next turn. If the target is large size or larger, it must succeed a 16 DC Constitution saving throw to prevent this effect.

Exalted State

• The additional cold damage on a hit becomes 4d4. 
• The weapon’s maximum charges becomes 10, and it regains 1d6+4 charges daily at dawn.
• The wielder can expend 8 charges to plunge the sword into the ground and cast Wall of Ice with a range of 20 feet.
• The wielder loses any body warmth they had, and your breath is chilled and visible. They gain immunity to fire damage. 

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Wondrous item, Silver, Versatile, Sap