Predator

Predator are expert in the art of tracking the scent of blood, and to cause quick damages to claim kills. They're also intense survivalists.

Blood's scent

At 3rd level, you can sens blood with ease. Creatures that are bloodied gain no benefits from the invisible condition against you, and cannot hide from you.
You also gain advantage on ability checks made to track bloodied creatures.

 

Also at 3rd level, once per turn you can add a d6 damage against creatures that have blood. If the creature is bloodied, you add 2d6 instead.

Adrenaline rush

At 7th level, adrenaline pumps in your vein when you are hurt. Once per short rest, as a bonus action when bloodied, you can get the benefits of the Haste spell for a number of rounds equal to your proficiency bonus. You do not use your concentration for this effect, and it doens't count as a magical effect. However, you still suffer the drawbacks of the spell, and must immediatly take a level of exhaustion as well. This effect ends early if you fall unconscious, or are no longer in combat.

Predator's instinct

At 11th level, your scenses are boosted. You gain advantage on all wisdom checks. If the check is made to track a bloodied creature, you roll an aditional dice for a total of three.

Also at 11th level, the extra damages from your Blood scent feature increases to a d8 or 2d8 against bloodied creatures.

Apex predator

At 15th level, your achieve your full potential. You deal the extra damages granted by the Blood scent feature on all your attacks.

Also at 15th level, your adrenaline rush is improved. It now lasts for a duration equal to two times your wisdome modifier. Additionaly, you cannot become unconscious while it is activated. You still follow the rules for taking damages while being at 0 hit points. If any damages would kill you while you are in the adrenaline rush, you imediatly die when it ends.