Blessed be thy ammo

3rd-level Evocation

Casting Time: 10mins
Range: Sight 
Components: Verbal, Somatic, Material (a small vial of holy water or powdered silver)
Duration: Until triggered 

You imbue your ammunition—bullets, arrows, bolts, or similar projectiles—with radiant energy, making them especially potent against demons, devils, and other fiends. Once cast, the spell has an infinite duration and requires no concentration. Each projectile you or your allies fire becomes imbued with divine power, glowing with a holy aura.

Effect:

• Imbued Projectiles: Any projectile you fire (or any you hand to another creature) is imbued with radiant energy. The projectile deals an additional 2d6 radiant damage on a successful hit.
• Fiend-Specific Effect: Against fiends (demons, devils, and other evil-aligned creatures from the lower planes), the radiant damage increases to 4d6. Additionally, fiends that are hit by an imbued projectile must make a Charisma saving throw (DC 15) or be frightened of the attacker for 1 minute. A creature that succeeds on the saving throw is immune to this effect for the duration of the spell.
• Ammunition Requirement: The spell affects only projectiles that can be used with ranged weapons—such as arrows, bolts, or bullets. The spell can imbue an unlimited number of projectiles. Once imbued, they retain their holy power indefinitely until used.
• Additional Effects: If a fiend is reduced to 0 hit points by a projectile imbued with holy energy, it is disintegratedinto radiant light, leaving behind no physical remains, and its soul is immediately banished to its respective plane (such as the Abyss or the Nine Hells).

At Higher Levels: When you cast this spell using a spell slot of 4th level or higher, the additional radiant damage increases by 1d6 for each level above 3rd.