Ammo of Weakness

Difficulty: Grandmaster

Crafting Yield: 5

When you craft this ammo, you may choose the form of ammunition created (arrow, bolt, blow dart, etc.)

When a target is hit by this ammunition, it must make a DC19 Constitution saving throw, or damage dealt by the creature's weapon attacks is halved until the effect ends. At the end of each of the target's turns, it can repeat the saving throw. On a success, the effect ends.