Bloodseeker

Bloodseekers are a group of assassins and bounty hunters that have many abilities related to blood and killing. They are notorious for their killing power and ability to overcome strong enemies.

Blood Frenzy

When you choose this archetype at 3rd level, you have advantage on attack rolls on enemies that don't have all of their health. You also deal additional piercing damage equal to your proficiency bonus, as a result of bleeding your enemies.

Crimson Mark

Starting at 3rd level, you are at your deadliest when your enemies are not. As a bonus action, you may mark a creature by it's blood, all attacks made on this creature are critical hits, this effect lasts for 30 seconds. You may use this action a number of times equal to your proficiency bonus per long rest. Also, all attacks made on a creature missing health are critical hits.

Sanguine Surge

Starting at 9th level, you can use your own blood to make you stronger. As an action, you cut your wrist and lose 10% of your health to blood loss, empowering yourself with blood:

• Add +2 to all your ability scores for 1 minute.
• Add your Dexterity modifier to your next weapon attack.

You may use this ability a number of times equal to your proficiency bonus.

Bloodsucker

At 13th level, you gain the ability to heal and recover by consuming blood. A number of times equal to your proficiency bonus per day,  you may drink a vial of blood you heal 25% of your max health.

Blood Weaver

Starting at 17th level, you become a master of blood. You gain the ability to manipulate and control blood external from a body, and the following abilities:

Crimson Shield.

You form a shield of blood to protect you, while this ability is active you gain +1 AC. This shield has 250 hit points and will float in front of you, any attack that might target you target's the shield instead, once the shield is reduced to 0 hit points it dissolves. 

Sanguine Daggers.

You form a pair of blood daggers to attack with, while this ability is active you gain +2 to melee weapon attacks made with these daggers. These daggers do as much damage as normal metal daggers. You heal hit points equal to half the damage you deal with these weapons. These daggers last for 1 day.

Blood Transference.

You provide a creature with blood and imbue it with your power to heal them. The creature you target heals by 25% of their max health.

You may use one of these abilities per day.