Bloodblade
Weapon (any sword), uncommon
This magical sword is made out of your coagulated blood.
If you reduce a creature to 0 hit points with a melee attack using the bloodblade, you can choose to immediately regain 1d6 hit points, or deal an extra 1d6 damage on your next hit with the bloodblade. Constructs, undead, and creatures without blood or an equivalent fluid, do not trigger this property. Only the creature who created the blade can use this property.
The ability to summon a bloodblade is a hemomantic process that can be learned by studying from a tome or teacher for 24 hours and a cost of 500 gp. Once you have learned the process, you can use an action to summon a bloodblade. When you summon the blade, you lose 2d6 hit points due to blood loss. You can choose to lose 3d6 hit points instead to gain a +1 bonus to attack and damage rolls with the blade. The bloodblade lasts 24 hours before it dissolves and is destroyed.
Hemomantic warriors can mingle the blood of their enemies with their own, utilizing their sanguine sorcery to rejuvenate themselves while dealing devastating wounds.