Immortal Shieldbow

1d10 piercing + 1d10 necrotic ammunition, heavy, reload, range (100/400), two-handed
once per turn you may choose to heal equal to the necrotic damage dealt by this weapon lifeline (1/lr):
As a reaction when you take damage. You gain 10 temporary hit points times proficiency bonus, which take as much of the triggering damage as possible. Immediately after you take the damage.
The temporary hit points last until the start of your next turn
once you have used this ability you cant do so until you finish a long rest

Rarity

Very rare heavy crossbow

Base Price

Price: 10000 gp