Cursed Warrior is a subclass all about your character's connection to the magical weapon they wield. Often cursed or forcibly attuned to the weapon, your character's soul is permanently bound to it. As you level up, your connection to it will strengthen and allow you to unleash powerful magics and enhance the weapon beyond any other. 

This subclass uses the Badaan Martial Weapons Doc. Please look at that document before or while reading this subclass.

Level 18: Wrath of the Weapon Barer

Whenever you use your action surge, you may cast one of your cursed spells as a part of that extra action.

Level 3: Soul Forged

Your weapon is cursed, you may have just discovered this or may have known all along. You are permanently bound to this weapon and can never unattune to it. Luckily for you, it's an extremely powerful weapon with magical properties.

The weapon must be a martial or simple weapon. No Firearms
You are always attuned to this weapon and can never be unattuned.
You cannot be unwillingly disarmed of this weapon.
You can summon this weapon to your hand as a no action as long as it's on the same plane as you.

This weapon gains 2 additional Rune slots
You may add Runes to this weapon for 50 gold pieces a rune slot instead of 100.

Level 3: Unleash

Being attuned to your cursed weapon has bestowed upon you a level of magical affinity. But you can only use this power through violence. Your weapon’s magic is fueled through combat, only through this can you unleash its power.
Choose a spell of 1st level that takes an action or bonus action to cast. This spell becomes designated as a Cursed Spell for you. Whenever you kill a creature or land a critical hit, if it is your turn, you may cast a Cursed Spell as a Bonus Action. You can only use this a number of times a day equal to your Charisma modifier. You use your Charisma modifier for the save DC and plus to hit for the spells.
You gain more cursed spells at certain levels. Such as:

5th:
Choose a spell of 2nd level or lower. That spell is designated as a Cursed Spell.

7th:
Choose a spell of 3rd level or lower. That spell is designated as a Cursed Spell.

9th:
Choose a spell of 4th level or lower. That spell is designated as a Cursed Spell.

11th:
Choose a spell of 5th level or lower. That spell is designated as a Cursed Spell.

Level 7: Cursed Affinity

Your Power over your weapon has grown, and its abilities have grown with it. Choose one of the keywords below. Your Weapon gains that keyword:
Heavy Swing
Critical
Parry
Armor Breaker

Armor Breaker

Your weapon gains the Armor Breaker Keyword.

Critical

Your weapon gains the Critical keyword.

Heavy Swing

Your weapon gains the Heavy Swing Keyword.

Parry

Your weapon gains the parry keyword.

Level 10: Cursed Knight

While wielding this weapon, you gain a bonus to your AC equal to your plus to hit with this weapon, halved, rounded down.

Level 15: Arcane Dissolution

Your weapon gains 2 Rune Slots
You have learned how to break down the magic empowering your weapon to heal yourself.
As a Bonus action on your turn, you may remove one rune permanently from your weapon. If you do, you gain 2d10+your level hit points and regain all uses of your Indomitable and Second Wind abilities.