Ammunition of Greater Aid

This ammunition is crafted with scrolling silver inlay and glows faintly with golden-white light when handled. When loosed at a target of your choice that you can see, the ammunition transforms into a bolt of light that streaks in their direction. No attack roll is needed for a willing creature; roll normally for an unwilling target. Do not roll damage. The target feels a sense of radiating warmth from the point of impact and regains 4d4 +4 hit points.

From Enchanted Ammunition: 101 Alchemical Arrows and Booming Bolts

Notes: Bonus: Hit Points