Source: Monstrous Compendium Volume 2 - Dragonlance Creatures

Weapon (Mace), Legendary (Requires Attunement)

This heavy mace has a dark oaken handle and a head of blackened steel trimmed with gold. In combat, the mace’s head is wreathed in inky black energy.

You gain a +3 bonus to attack and damage rolls made with this weapon. When you hit with an attack roll using it, the target takes an additional 4d4 radiant damage.

If you have an evil alignment, you also gain the following benefits when attuned to Nightbringer:

Blessing of the Dragon Queen. You are immune to the charmed and frightened conditions, and you gain immunity to one of the following damage types (choose when you attune to the weapon): acid, cold, fire, lightning, or poison.

Eyes of Midnight. You have darkvision with a range of 60 feet. If you already have darkvision, its range increases by 60 feet.

Midnight Shroud. The weapon has 6 charges. When you hit a creature with an attack using this weapon, you can expend one charge to force the creature to make a DC 20 Constitution saving throw. On a failed save, the creature is blinded until the start of your next turn. The weapon regains 1d6 expended charges daily at dawn.