Auri-El

Created from a long forgotten pact between the elven gods Araleth Letheranil and Sehanine Moonbow, This elegant elven longbow is made of polished moonstone and radiates alien energy, as if not from this world. It seems to draw its power from the sun itself. While attuned to this bow, you automatically know the sun's exact location in the sky as long as the sky is visible, and you gain advantage on Wisdom (Survival) checks made to ascertain the direction you are facing.

You have a +3 bonus to attack and damage rolls made with this magic weapon. When you hit with an attack roll using this magic bow, the target takes an extra 1d10 radiant damage. If the target is an undead, the attack deals an additional extra 2d10 radiant damage, and the creature has disadvantage on saving throws against effects that turn undead until the start of your next turn.

Instead of attacking a target, you can instead use your attack to target the sun with this bow. When you do so, the sun shines brighter in a 30 foot radius around you. Any creature who starts their turn in this area or enters it for the first time on their turn must succeed on a Constitution saving throw with a DC of 8 + your attack modifier for this bow, taking 1d10 radiant damage on a failed save, or no damage on a successful save. Undead who fail this saving throw take 2d10 radiant damage on a failed save, or half as much on a successful save. You can only use this property in the open and during the day, though the sun need not be entirely visible.

If you load no ammunition in the weapon, it produces its own, automatically creating one piece of magic ammunition when you pull back the string. The ammunition created by the bow vanishes the instant after it hits or misses a target.

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

Notes: Bonus: Magic, Damage: Radiant, Damage: Radiant, Advantage: Survival, Damage, Combat, Bane, Ammunition, Heavy, Range, Two-Handed, Slow