Winter’s End

Bow (any), rare (requires attunement)
  Woven from the first branches to bloom at the end of winter, this living bow is strung with a length of snowspider’s silk. When an arrow is nocked, the ammunition immediately lights up, shedding bright light for 15 feet, dim light for an additional 15 feet, and emanates a blue, rolling mist. This light lasts for one minute after the arrow is shot from the bow.
  You have a +1 bonus to attack and damage rolls made with this weapon. While attuned to this item, you can cast the druidcraft cantrip at will.
  Winter Hunt. While your target is standing on snow or ice, or is in subzero conditions, you deal an extra 1d6 cold damage when you hit with a weapon attack using this magic weapon.
  Ice Shower. As an action, you can choose a point you can see within the normal range of this weapon and fire a volley of up to six arrows. These arrows levitate in the air when they enter a 15-foot radius of that point. For the next minute, or until all the arrows are used, whenever a creature enters the area for the first time on a turn or starts its turn there, one arrow shoots at it. The creature must succeed on a DC 15 Dexterity saving throw or take 1d6 piercing and 1d6 cold damage. Once you use this property, you can’t do so again until the following dawn.
  Uncommon variant: Remove the bonus to attack and damage rolls, and the druidcraft cantrip. Decrease the cold damage of all properties to 1d4. When you use the Ice Shower property, the radius decreases to 10 feet and the DC decreases to 13.
  Very rare variant: Increase the bonus to + 2 and the cold damage of all properties to 1d8. When you use the Ice Shower property, the radius increases to 20 feet, you can fire up to eight arrows, and the DC increases to 16.
  Legendary variant: Increase the bonus to + 3 and the cold damage of all properties to 1d10. When you use the Ice Shower property, the radius increases to 30 feet, you can fire up to ten arrows, and the DC increases to 17.