The Winter's Bite is one of nine blades wielded by the captains of the Sluagh na Geimhreadh, the Winter Hunt of the Fey Winter Court.

Winter's Bite is a heavy cavalry saber. It is a versatile weapon, doing 1d8 slashing damage one-handed, but 1d10 damage when you are mounted.
You have a +1 bonus to attack and damage rolls made with this magic weapon.
Proficiency with a longsword (and/or saber) allows you to add your proficiency bonus to the attack roll for any attack you make with it.

When you roll a 20 on your attack roll with this magic weapon, the target takes an extra 2d6 slashing damage.

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

Notes: Damage: Additional, by Barbarian, Fighter, Paladin, or Ranger., Damage, Combat, Versatile, Sap