Bolts of Dragonslaying

Quantity: 3 Bolts of Dragonslaying
When you use these crossbow bolts as ammunition, you gain a +3 bonus to the attack roll and the damage roll.
A dragon hit by this arrow must make a
DC 17 Constitution saving throw. The
dragon takes 6d10 extra damage on a failed saving throw, or half that extra damage on a successful saving throw.