A Spiritsworn fighter is one that masters their martial prowess in tandem with a special spirit weapon, forming an unbreakable bond of shared growth and becoming a peerless martial team.

Spirit's Nature
The nature of the spirit that forms this archetype's spirit weapon is open ended. You can roll from the following table, pick one that suits the character, or invent an entirely unique relation between the spirit and fighter.

1d6 Spirit Type
1 A manifestation of your own mystical aura, it represents your will to fight.
2 A fey spirit that has become inseparable bonded to you.
3 A celestial entity that chose you for a destiny or task.
4 An heirloom weapon passed down through your family, inhabited by an ancestral spirit.
5 A fiendish spirit granted as part of an infernal contract paid at a terrible price.
6 A mysterious piece of your shadow.

Spirit's Aspect
The spirit's primary power is that of a weapon, but it is a magical entity and the bond with the fighter is mystical in nature; it grants the fighter unique powers. You can roll on the following table for the primordial aspect, or select one that suits the character. The selection expands the subclass spell list, found at the end of the subclass.

1d6 Spirit's Power
1 Fire
2 Ice
3 Storm
4 Illusion
5 Gravity
6 Nature

Level 3: Spirit Weapon

Starting at 3rd level when you select this archetype, you become permanently bonded to a special spirit that can manifest into the form of any weapon you are proficient with. You can manifest the spirit as a bonus action, and it lasts until you spend a bonus action to return it to its intangible form. The spirit is typically intangible and imperceptible to anyone other than you when not manifested.

While it is manifested, you can change its form as a bonus action. If you are ever more than 300 feet from the weapon, or enter a different plane, the spirit returns to you in intangible form, its weapon form vanishing.

If the spirit manifests as a ranged weapon, it manifests with one piece of ammunition already loaded. Further attacks require ammunition (and loading, if applicable) as necessary. Each time you change the form of your Spirit Weapon, it reforms in your hand.

As part of a long rest, the spirit can absorb a magic weapon as long as that weapon is not a sentient weapon. When it does so, the spirit gains any bonus to attack and damage rolls that weapon has, and can perfectly imitate that weapon (though only gains any property other than a bonus to attack and damage rolls when mimicking the absorbed weapon). It can have one weapon absorbed in this way at a time, and absorbing a new weapon returns the previously absorbed weapon.

Bonded Fighting Style
When you gain your Spirit Weapon, your ability and prowess at fighting becomes linked to it. Whenever you manifest your spirit, you can change your Fighting Style to apply to the weapon type it has formed as (for example, if you form it as a rapier, you can gain the Dueling Fighting Style). You may revert your Fighting Style to its original choice when you dismiss your Spirit Weapon.

Level 3: Spellcasting

Spirit Magic
Additionally at 3rd level, your link to a mystical spirit grants you the ability to use certain magic through it. Your Spirit Weapon counts as an arcane focus, and is considered worth the value of the weapon it takes the form of when being used as a material component for spells.

Spell Slots
The Spiritsworn table shows how many spell slots you have to cast your spells of 1st level and higher. To cast one of these spells, you must expend a slot of the spell’s level or higher. You regain all expended spell slots when you finish a long rest.

Spiritsworn Spellcasting

Fighter Level	Spells Known	— Spell Slots per Spell Level —
		1st	2nd	3rd	4th
3rd	2	2	—	—	—
4th	2	3	—	—	—
5th	3	3	—	—	—
6th	3	3	—	—	—
7th	4	4	2	—	—
8th	4	4	2	—	—
9th	5	4	2	—	—
10th	5	4	3	—	—
11th	6	4	3	—	—
12th	6	4	3	—	—
13th	7	4	3	2	—
14th	7	4	3	2	—
15th	8	4	3	2	—
16th	8	4	3	3	—
17th	9	4	3	3	—
18th	9	4	3	3	—
19th	10	4	3	3	1
20th	10	4	3	3	1

Spells Known of 1st-Level and Higher
You learn two spells of your choice from the Spiritsworn spell list. You gain additional spells based on the spirit's aspect, listed at the end of this class. The Spells known column shows when you learn more spells of 1st level or higher.

Whenever you gain a level in this class, you can replace one of the spells you know with another spell of your choice from the Spiritsworn spell list. Spells gained from the spirit's aspect cannot be replaced. The new spell must be of a level for which you have spell slots.

Spellcasting Ability
Your spell casting ability is Wisdom, with your spells being an expression of bond with a spirit. You use your Wisdom whenever a spell refers to your spellcasting ability. In addition, you use your Wisdom modifier when setting the saving throw DC for spells you can cast, and when you make an attack roll with one.

Spell Save DC = 8 + your proficiency bonus + your Wisdom modifier

Spell Attack Modifier = your proficiency bonus + your Wisdom modifier

Level 7: Advanced Weapon Formation

Starting at 7th level, when you manifest or morph your Spirit Weapon, you can take advantage of its unique nature to grant it exotic properties that would otherwise be impossible. You can select one of the following properties when you manifest or change its form:

Enlarged Form. The Spirit Weapon grows one size larger, but your bond with it allows you to wield it effortlessly. It deals an additional 1d4 damage on hit.
Extended Form. The weapon narrows and extends, gaining the Reach property. If it already has the reach property, its reach increases by 5 feet.
Shield Form. The spirit can take the form of a Shield, and you can equip it as part of its manifestation or changing its form. If the spirit's weapon form has a bonus to attack and damage rolls, that bonus becomes a bonus to AC while in this form.

Enlarged Form

The Spirit Weapon grows one size larger, but your bond with it allows you to wield it effortlessly. It deals an additional 1d4 damage on hit.

Extended Form

The weapon narrows and extends, gaining the Reach property. If it already has the reach property, its reach increases by 5 feet.

Shield Form

The spirit can take the form of a Shield, and you can equip it as part of its manifestation or changing its form. If the spirit's weapon form has a bonus to attack and damage rolls, that bonus becomes a bonus to AC while in this form.

Level 7: Empowered Strike

Additionally at 7th level, you gain the ability to empower your weapon with its aspect. When you manifest or change the form of your Spirit Weapon, you can expend a spell slot of 1st level or higher. When you do so, the first time you deal damage with it before dismissing or changing its shape again, it deals an additional 1d10 damage of a type matching it's aspect (fire, cold, lightning, psychic, bludgeoning, or acid respectively).

Level 10: Second Senses

Starting at 10th level, your spirit's ability to share your senses allows it to forewarn and assist you. You gain proficiency in the Perception skill. If you are already proficient, you gain expertise in the Perception skill, meaning you can add twice your proficiency bonus to Perception ability checks.

Additionally, this heightened awareness gives you proficiency with Dexterity saving throws against effects you can see.

Level 15: Shared Concentration

Starting at 15th level, when you cast a spell that requires concentration that targets your Spirit Weapon (either a range Touch spell targeting it or a range Self effect which uses it as a material component), your concentration can’t be broken as a result of taking damage.

Level 18: Synchronized Assault

Starting at 18th level, manifesting or changing the form of your Spirit Weapon no longer requires a bonus action. You can cause it to take any form it could normally take at will during your turn, no action required. Once per turn, when manifesting the weapon or changing the form of your weapon, you can gain advantage on the next attack you make before the end of your turn.