Vital Blood Feat

Your mastery of blood magic has given it magical properties, brimming with unnatural vitality. You gain the following benefits:

Prerequisite: Spellcasting or Pact Magic Feature

• Ability Score Increase. Increase your Constitution, Wisdom, Intelligence, or Charisma score by 1, to a maximum of 20.
• Bloody Vitality. When you complete a short rest while you are Bloodied (have less than half your maximum hit points) before rolling any hit dice, you regain hit points equal to your spellcasting modifier.
• Crimson Potion. As an action, you can take 1d4 slashing damage to splatter some of your blood on a willing creature within 5 feet, granting them the effects of a Potion of Healing. Once you use this ability you cannot use it again until you complete a short or long rest.

Source: KCLL

Crafting System Integration

• If using the Kibbles' Crafting System, if you have the Vital Blood feat, once per week you can extract some of your blood to use it as a Common Curative Reagent in crafting.