To become a Fighter, you must first put a Character Point (CP) into Prowess.
Prowess (1 CP)
This ability gives you a Prowess pool of 3. To gain additional Prowess, each subsequent character point you put into Prowess gives you 3 more Prowess points.
After putting your first CP into Prowess, you now have four Skill Tree Options to choose from: Reaver, Paladin, Champion, or Ranger. You can multiclass if you so chose but you must chose the abilities in the order they are presented on the tree. After you have completed a full Skill Tree, you have the option of choosing one of two Capstone abilities available. Of note, each Capstone ability costs 2 CP.

A Reaver is a fighter type who is known for having a large amount of indescriminate offensive output. Their signature ability, Rage, is so called because they are known for going on a rampage during battle when the odds are against them. In the mind of a Reaver, the more enemies there are, the better.
Level 1 ability: Cleave
You can use 1 point of Prowess to call Cleave on an enemy.
Level 2 ability: Rage
Once per day, you can call Cleave once per second for 10 seconds without spending any points of Prowess.
Level 3 ability: Relentless
When you activate your Rage ability, you become invulnerable for the duration of your Rage (meaning you cannot take any damage from any source).
Path of the Berserker (2 CP)
You can now use your Rage ability twice per day.
Path of the Storm (2 CP)
You can convert your HP into Prowess. To do so, you spend 10 seconds of appropriate roleplay to draw from your life force to convert 1 point of your health into 1 point of Prowess.
A Paladin is a fighter type who specializes in dealing with the profane. Undead and demons are especially offensive to the Paladin, and as such, their abilities revolve around destroying them. Their signature ability, Smite, is a powerful tool that can kill even the most armored of Bloodless. In the mind of a Paladin, it is their sacred duty to cleanse the world of the unholy abominations that defile it.
Oath of the Devoted (2 CP)
You can now heal your allies and yourself (provided you are not at zero HP). To do so, you must perform 3 seconds of appropriate roleplay and spend 1 point of Prowess to call Heal.
Oath of the Pure (2 CP)
You cannot ever be under the influence of environmental effects, roleplay effects, charmed or frightened. Your mind is always your own.
A Champion is a fighter type that values fortifiying both the mind and the body over all else. They specialize in defensive techniques to stay alive and fighting on the battlefield for as long as possible. Their signature ability, Tough, allows them to take many more hits in combat than would normally be possible. In the mind of a Champion fighter, if I can breathe then I can fight.
Level 1 ability: Heroism
You can use 1 point of Prowess to call Dauntless on yourself.
Level 2 ability: Tough
Your base HP is doubled.
Note: Base HP is 2 and any HP boosting effect from armor and/or enchanted items you are attuned to are also doubled. Temporary HP from potions or other temporary buffs, such as the Bard's Rousing Performance ability, are not doubled.
Level 3 ability: Unstoppable
You can use 3 points of Prowess to call Unstoppable on yourself.
Eldritch Knight (2 CP)
You can now cast a spell with your Prowess pool: Weaken (2 Prowess to cast). If you already have the ability to call Weaken, you may instead gain the ability to call it once per day for free (no Mana or Prowess cost). In addition, your base Prowess pool is increased by 2.
Rune Knight (2 CP)
Any effect from Enchanted weapons you use are doubled (example: If a weapon allows you to make a call for free once per day, you can now use that call twice per day for free). In addition, your base HP is increased by 1.
A Ranger is a fighter type who uses survival skills and knowledge of the natural environment to their advantage. They specialize in both working with and fighting against the beasts and monsters of the known world. Their signature ability, Wither, is especially adept at taking down the mightest of creatures. In the mind of a Ranger, the natural world is to be both feared and respected.
Level 1 ability: Scout
You can do 10 seconds of appropriate roleplay to look for tracks and scan the terrain then spend 1 point of Prowess to call out Reveal.
Level 2 ability: Hunter
You can use 2 points of Prowess to call Wither.
Level 3 ability: Grounded in Nature
The effects you gain from potions are doubled.
Slayer (2 CP)
Once per day, you can Hunter’s Mark a specific enemy (Note: this can be a boss type enemy). When you are fighting this Marked enemy, you gain the following abilities:
You may call Wither on this enemy once for no Prowess cost
Your HP is increased temporarily by 2
You can ignore the first hit (including calls) made by this enemy.
Note: Once this Marked enemy is defeated or is otherwise removed from battle, any temporary increases in stats are removed.
Primal Warden (2 CP)
You can now cast a spell with your Prowess pool: Root, costing 1 Prowess to cast. If you already have the ability to call Root, you may instead gain the ability to call it twice per day for free (no Mana or Prowess cost). In addition, your Grounded in Nature ability is improved, the effects you gain from potions are now tripled.