Necrotic Warrior

You are a warrior who is able to use the undead to assist yourself in battle.

Bonus Proficiency

You gain proficiency in Arcana

Arise

At 3rd level, when you slay an enemy, you can use your reaction to make them become an undead ally. The undead you raise can only be up to a CR equal to 1/4th your fighter level rounded down. The amount of undead you can have at any given time is equal to your proficiency bonus.

Undead Information

Once a creature becomes your undead, their hit points are halved, however, they gain one use of Undead Fortitude. When an undead creature under your control reaches death saves, they go back to the great beyond not being able to rise again. Your undead count as sidekicks, and they roll initiative at -10.

Undead Sense

At 7th level, you are able to sense anything that your undead summons can sense. For example, you can hear or see what your undead can.

Meat Shield

At 10th level, as a reaction to being hit, if one of your undead summons are within your reach, you can make them go in front of you to take the damage for you.

Teleporting Swap

At 15th level, you can use your bonus action to swap places with an undead summon within your range of sight. Doing this does not provoke an opportunity attack on you or your summon. This ability has an amount of charges equal to your proficiency bonus that you regain after a long rest.

Skeletal Armor

At 18th level, you surround yourself in bones of the dead, giving you an  unarmored defense of 15 + your dexterity modifier + your strength modifier.