Slayer

On the battlefield, the strong will survive. Your style is brutality, with victory as the the expected result, nothing more nothing less. A Slayerer requires a strong will however, they must not lose themselves to the bloodlust.

Murderous Intent

Starting at 3rd level, your discipline has given you a grim aura. You can exude the bloodlust you harbor as an action, forcing creatures within 30ft of you to make a Wisdom saving throw (DC equal to 8 + your proficiency modifier + your Con modifier) or become Frightened of you until the end of your next turn. On subsequent turns, you may use a bonus action to force the creatures to make another saving throw, staying Frightened of you on a failure. At the beginning of your turn, you gain 1 bloodlust point for each creature frightened of you. These points last until the start of your next turn, and your other features will use these bloodlust points.

Additionally, you gain proficiency in the Intimidation skill, and can double your proficiency bonus in the Intimidation skill.

Exploiting Weakness

Finally at 3rd level, you take advantage of the momentary lapse your fear causes. If there are Frightened creatures within 30ft of you, you can expend 1 bloodlust point and your bonus action to move to one of these creatures make an attack against them. You gain Temporary Hit Points equal to your Fighter level + your Con modifier that lasts until the end of your next turn.

Additionally, when making an attack against a Frightened creature you may spend 1 bloodlust point to gain advantage on the attack roll.

Blood Hound

Starting at 7th level, your experience in battle gives you a supernatural awareness of the area around you. You can not be surprised, and at the start of your turn you may spend 1 bloodlust point. If you do you know the locations of all creatures within 60ft of you, regardless of if you can see them or not. Creatures revealed to you this way can not benefit from being hidden from you.

Never Rest

Starting at 10th level, your will to fight doesn't let you pause even for a moment. When you use your Action Surge feature, you can expend a bloodlust point to regain a use of it that you can use in the same turn.

Harbinger

Starting at 15th level, your mere presence signifies the slaughter. Creatures can not benefit from resistance or immunity to the Frightened condition when making a saving throw against your Murderous Intent feature.

Additionally, when you reduce a creature to 0 hit points you gain bloodlust points equal to your proficiency bonus.

Last Breath

Starting at 17th level, even death can't stop your massacre. When you fail a death saving throw, you may stand and immediate take a turn. Your attacks during this turn are made with advantage and deal additionally damage equal to your level. Once you use this feature you can not do so again until you have finished a long rest.