Wound

If you hit a creature with this weapon, you can force the creature to make a Constitution saving throw (DC 8 plus the ability modifier used to make the attack roll and your Proficiency Bonus). On a failed save, the creature gains a Wound stack (up to 5). At the start of its turn, the creature takes slashing damage based on the number of Wound stacks it has: 1 stack: 1d4, 2 stacks: 1d6, 3 stacks: 1d8, 4 stacks: 1d10, and 5 stacks: 1d12. At the end of its turn, the creature can repeat the saving throw, removing one Wound stack on a success. When the target is healed, its number of Wound stacks becomes 0, ending the effect.