Spiritlight

Wondrous item (warhammer) rare (requires attunement)

Forged from pure silver, this warhammer is always warm to the touch. You gain a +1 bonus to attack and damage rolls when made with this weapon. An Undead hit by the weapon takes an additional 1d8 radiant damage. While holding this warhammer, you can use a bonus action to cause it to glow with sunlight. The warhammer emits bright light in a 20-foot radius and dim light for an additional 20 feet. You can use your bonus action to cause the warhammer to stop glowing.