Kensei

Warriors renowned for their unmatched prowess in battle, unquestionable fealty to their lord, and self-discipline only true to those who have lived every day as their last. These warriors fight for no one, but their sworn lord and will answer to their beckon and call without hesitation. Whether to lay waste to their lord's enemies, douse the flames of rebellion, or to uphold law and order within the walls of the lord's kingdom, they do so with strength and their lord's will.

Loyalty (Chūjitsu)

At 3rd level, your discipline to the practices you choose and determination to the ones you love are what make your iron heart; strong, reliable, and sharp, the same as your weapons annealed in the roaring fires of the forge. Once per turn, whenever you are within 15ft. of an ally and you hit an enemy with a weapon you're proficient with, you may add either your Strength or Dexterity Modifier bonus to one of the damage rolls. 

If you applied the Strength modifier to the damage roll, your next weapon melee attack made with the same weapon in the same turn takes a -2 to attack rolls, but your total damage is instantly doubled for that attack. This stacks with a natural 20 roll.

If you applied the Dexterity modifier to the damage roll, your next weapon melee attack made with the same weapon in the same turn gains a +2 to attack rolls, but you may not add your Dexterity or Strength mod to the damage rolled, even if you normally would.

At 10th level, the increases and decreases to -5/+3.

Courage (Yuretsu)

At 7th level, countless hours of training have allowed you to conform your body to the will of the mind. You are immune to being frightened or charmed, unless by magical means, of which you have advantage instead. Additionally, you also have advantage on Constitution saving throws.

Veracity (Seikaku)

• At 10th level, you are concise, accurate, and swift in the things you do, to the point of second nature. Whenever you roll the highest possible roll on a die you gain the following benefits in the following categories:

  1) Damage: You roll one more damage die of that type, this is added after the natural 20 damage

  2) Skill Check: You may double your proficiency bonus on the next roll of that skill check's ability category within an hour. Stacks with the Skillful feature

  3) Saving Throw: Your next roll in that saving throw has advantage within an hour

At 15th level, this ability now triggers on a roll of 19 or 20. At 18th level, this ability triggers on a natural roll of 18-20.

Compassion (Nasake)

At 15th level, even through the strong demeanor you portray as a mighty warrior, you show great empathy and sympathy to others of innocence. Whenever you are talking to a creature that is friendly towards you or your allies and can understand you, you have advantage on Persuasion (Charisma) skill checks and Insight (Wisdom) skill checks against them. Additionally, when you show an act of kindness such as generosity or forgiveness towards hostile creatures (DM's discretion) they must make a Wisdom Saving Throw. If they fail, they may still remain hostile towards you, but are more reasonable then they were before, if intellectually capable.

Honor (Shojiki)

At 18th level, you have now formally come to the final virtue every warrior of your ideal must learn, one that is of the greatest importance: Honor. It is something that does not necessarily include the integrity of others, but the dignity for yourself. Whenever you are facing 1 or more hostile creatures and there are no allies within 30ft, as a Bonus Action you may enter a battle trance lasting for 1 minute. This trance is called Bushido. In this state, you gain the following benefits:

• You are immune to being frightened, charmed, or possessed.
• You have advantage on all attacks for the duration
• You gain a +2 to AC
• The Sneak Attack feature does not apply to you
• You have Blindsense of 15ft.

However, once you enter this state, you cannot retreat or leave initiative until all enemies within the 60ft. have been defeated or have retreated. You may do this a number times equal to your Constitution modifier. Resets on a Long Rest.