Sunwing Light Crossbow (Very Rare)

Ammo: crossbow bolt

Sinew harvested from a suneater owlbear's spine can imbue arrows with low-level radiation, which is passed onto a target when struck by the ammunition. The magic of suneater respiration lies in their photometabolism; they can convert sunlight into pure, concentrated radiant energy, unleashing unholy beams of destructive force. You gain a +3 bonus to attack and damage rolls made with this magic weapon.

Sunshot: While in sunlight, this bow doesn't need ammunition. If you draw this weapon's bowstring without nocking an arrow, it produces its own ammunition, automatically creating a radiant arrow when you make a ranged attack with it. The attack deals radiant damage instead of the weapon's normal damage. The arrow created by this weapon vanishes the instant after it hits or misses a target.

Irradiation: A creature that takes radiant damage from this bow becomes magically marked for 1 hour. During this time, it leaves an invisible trail that can be seen by creatures with truesight or creatures using the detect magic spell. The trail fades after 1 hour.

Optional Attunement: If you choose to attune to this weapon, it gains the Daylight and Solar Beam properties and has 3 charges. The sunwing bow regains 1 expended charge daily at dawn. If it is exposed to dawn's light, it regains all expended charges instead.

Solar Beam: As an action, you can expend 1 charge to fire a beam of solar energy in a 5-footwide, 60-foot-long line originating from you. Each creature in the area must make a DC 16 Dexterity saving throw, taking 6d8 radiant damage on a failed save, or half as much damage on a successful one.

Daylight: When you take the Attack action, you can use one attack to fire a radiant arrow from this bow at a surface within the bow's range and expend 1 charge. A magical effect identical to the daylight spell manifests for 1 hour, centered wherever the arrow strikes the surface.

Ammunition: You can use a weapon that has the ammunition property to make a ranged attack only if you have ammunition to fire from the weapon. Each time you attack with the weapon, you expend one piece of ammunition. The ammunition of a firearm is destroyed upon use. Drawing the ammunition from a quiver, case, or other container is part of the attack (you need a free hand to load a one-handed weapon). At the end of the battle, you can recover half your expended ammunition by taking a minute to search the battlefield. If you use a weapon that has the ammunition property to make a melee attack, you treat the weapon as an improvised weapon (see "Improvised Weapons").

Range: A weapon that can be used to make a ranged attack has a range shown in parentheses after the ammunition or thrown property. The range lists two numbers. The first is the weapon's normal range in feet, and the second indicates the weapon's maximum range. When attacking a target beyond normal range, you have disadvantage on the attack roll. You can't attack a target beyond the weapon's long range.

Loading: Because of the time required to load this weapon, you can fire only one piece of ammunition from it when you use an action, bonus action, or reaction to fire it, regardless of the number of attacks you can normally make.

Two-Handed: This weapon requires two hands when you attack with it.

Proficiency: simple, light crossbow Source: Heliana's Guide to Monster Hunting - Part One p. 448, Player's Handbook (2014) p. 149