The hilt of this sword bears a carnelian engraved with the blood rune.
You can add your Constitution modifier (minimum of +1) to the damage rolls of attacks made with this weapon.
When you target a creature with an attack using this weapon, you can invoke the sword's rune, causing it to flare with crimson light and infusing your attack with bloodthirsty precision. You then spend and roll one of your unspent Hit Dice and add the number rolled to the attack roll. You can choose to invoke the rune after rolling the d20.
If this attack hits, you can also spend and roll any number of your unspent Hit Dice and add the total rolled to the weapon's damage.
Once the rune has been invoked, it can't be invoked again until the next dawn.
You have Disadvantage on attack rolls with a Heavy weapon if it's a Melee weapon and your Strength score isn't at least 13 or if it's a Ranged weapon and your Dexterity score isn't at least 13.
A Two-Handed weapon requires two hands when you attack with it.
If your attack roll with this weapon misses a creature, you can deal damage to that creature equal to the ability modifier you used to make the attack roll. This damage is the same type dealt by the weapon, and the damage can be increased only by increasing the ability modifier.