Soul Fighter

What is a soul fighter?

Well, legends say there are fighters who fight with powerful weapons, weapons that no blacksmith can recreate, those weapons are ethereal weapons, they are created from a soul.
When a creature dies, their souls stay in the present plain, using a soul book, a soul fighter can store those souls and transform them into powerful ethereal weapons.

Legends also say that those skills can be upgraded to also have ethereal armor but that is just a myth, or is it?

Soul book

Beginning when you choose this archetype at 3rd level, you are now able to take your opponent's soul upon their death, That soul turns into an ethereal weapon that is most like the person's soul, and is stored in a soul book, then using the soul book you may pull one ethereal weapon per day, each level you go up is what level souls you can use, so level 3 means only using level 3 souls you can kill things with a higher soul but it will transform into your level soul so a level 10 soul will transform into a level 3 and so forth.

At the start, you can only hold 5 souls, upon reaching the 7th level you may hold 10, upon 10th level you can hold 15, upon reaching the 15th level your soul book can hold 25 souls, and at the final 20th level you can hold a total of 50 souls.

Soul Fusion

Starting at 7th level, Your ethereal weapons connect to your own soul giving you +10 str, +10 dex.
 
At 10th level, the ethereal weapons give you +15 str, +15 dex.

At 15th level, the ethereal weapons give you +25 str, +25 dex.

At 18th level, the ethereal weapons give you +50 str, +50 dex.

Duel Souls

At 10th level, you become a master of one-handed ethereal weapons making it so you can dual wield one-handed ethereal weapons.
At 15th level, you become a master of two-handed ethereal weapons making it so you can dual wield two-handed ethereal weapons like one-handed ethereal.

Armor Soul

At 15th level, ethereal weapons now have armor that goes along with it, making it so you have mastery over every weapon.

Ethereal Mastery

At 18th level, you become master of the souls, able to switch from one ethereal weapon to another in mid-battle, so each attack that you do is a different weapon.