Berserker

A Berserker is an fighter who has learnt to use brutal words and tactics to break the will of anyone foolish enough to cross weapons with them. A berserker will cause fear with their strikes, cause lasting damage that saps an opponents strength or at least directs their attention to themselves, to save the weaker members of their team

Will breaker

Starting at 3rd level, once a turn, when you hit an enemy with an attack, yoy can choose to change their damage type to psychic damage. Starting at level 10, when yoy choose to do this, you deal an additional 1d8 psychic damage 

Avatar of terror

You learn to use your very presence and brutality to instil fear into you enemies, and use their fear to inflict even more pain. As a bonus action, you can activate this ability and it lasts 1 minute, unless you fall unconscious or you dismiss it with a bonus action. While activated, you gain the following benefits. 

1) Every enemy who starts their turn within 10 feet of you must make a wisdom saving throw or be frightend of you

2)The first attack you make against an enemy does an additional 1d8 psychic damage. This increases to 2d8 at level 10.

3)If any enemy damages you with an attack,  you can use your reaction to cause them to take psychic damage equal to 2 + your fighter level (minimum of 3). 

You can use this feature a number of times equal to your proficiency bonus. All charges of this ability come back on a long rest.

Embrace Carnage

Startong at level 7, when you kill an enemy, you can move up to half your movement speed and make one attack against an enemy in range. This movement does to provoke opportunity attacks. 

Soul drinker

You target a creature and rip out part of them to power yourself. When you use this ability you  target on creature within 30 feet of you. You gain temporary hit points equal to 2  + your fighter level. Also, all attack rolls against the targeted creature are made with advantage until the start of your next turn.

You can use this feature a number of times equal to your constitution modifier.

Shattered Spirit

Startong at level 15, your Will Breaker ability now gains the following benefits:

1) You can choose if your strikes inflict psychic or force damage

2) Any enemy hit with this ability makes the savings throw to resist your Avatar of Pain ability at disadvantage

3) when you hit an enemy, you can choose to force them to make a strength saving throw or be knocked prone

Living Nightmare

When you activate your Avatar of Terror ability, you gain the following benefits:

1) The radius of your fear effect is now 30 feet

2) You grow black, skeletal wings, which grants you a flying speed equal to your walking speed

3) All enemies have disadvantage on attacks on any ally stood within 30 feet of you