Dawnbringer

You gain a +2 bonus to attack and damage rolls
made with this weapon, which deals radiant
damage instead of slashing damage. When you
hit an undead with it, that target takes an extra
1d8 radiant damage. The sword's luminous blade
emits bright light in a 15-foot radius and dim
light for an additional 15 feet. The light is
sunlight. While the blade persists, you can use an
action to expand or reduce its radius of bright
and dim light by 5 feet each, to a maximum of 30
feet each or a min