Light Drinker

This sword's hilt and blade are forged of a single piece of black metal that seems to absorb the light around it. You gain a +2 bonus to attack and damage rolls made with this weapon, which deals cold damage instead of slashing damage. While attuned to the sword, you gain darkvision to 60 feet and can see in magical darkness. As a bonus action, you can cause the sword to emit magical darkness in a 15-foot radius and dim light for an additional 15 feet. While the darkness is active, you can use an action to expand or reduce its radius of darkness by 5 feet each, to a maximum of 30 feet each or a minimum of 10 feet each. Darkness created by this sword can only be suppressed by an antimagic field.

Versatile: This weapon can be used with one or two hands. A damage value in parentheses appears with the property—the damage when the weapon is used with two hands to make a melee attack.

Proficiency: martial, longsword Source: Grim Hollow: Player's Guide p. 139 (Third Party), Player's Handbook p. 149