Path of the Doomslayer

As the Doom Slayer subclass, you gain a +2 bonus to your armor class and an +10 increase in movement speed. Additionally, all melee, ranged attack and damage rolls have a +2 bonus. You also gain access to cantrips that don't require concentration, and can even use them while raging.  

Rage of the Empowered

Starting when you choose this path at 3rd level, you can go into a frenzy when you rage. While in this frenzy, instead of making a melee weapon attack, you can cast one cantrip of your choice as a bonus action instead of a weapon attack. 

Slayer

As the slayer, you gain a bonus to both your speed (+10), armor class (+2) and attack rolls (+2), and also gain access to one cantrip.

Eldritch Blow

Starting at 6th level as a bonus action, two times per short rest, you can imbue one melee weapon of your choice with the cantrip  you chose. When you deal damage with an attack, you deal an additional 1d10 of damage related to the cantrip that you chose. You can only use this ability once per short rest if you're raging.

Retaliation

Starting at 10th level, when you take damage from a creature that is within 5 feet of you, you can use your reaction to make a melee weapon or spell attack against that creature. If that creature is a fiend, you can make your roll a critical hit for the attack. 

Demonic Brand

At 10th level, you gain resistance to fire damage and bludgeoning, piercing and slashing damage from nonmagical weapons.

Glory Kill

Starting at 14th level, when you kill a creature, and your hit points are less than your maximum; you can regain hit points equal to half of that creatures own.