Base Class: Fighter
Samurai variant Sword Saint Custom of Pathfinders
Iai-counter
You may use a reaction to make an attack of opportunity against a melee attack made against you. You may apply Iaijutsu strike and Iaijutsu Secondary Strike if your weapon is sheathed.
Art of the Ieyasu
At level 3 when taking this style, you learn the art of quick drawing your weapon on devastating you enemies with one strike known as the Iajutsu Strike. You can only forgo Iaijutsu Strike once per turn. While your weapon is sheath, Your next attack is at advantage and adds critical hit equal to half your fighter level. When you declare an attack action an you weapon is sheath, you can forgo Iaijutsu strike. Iaijutsu Strike also requires you to draw that weapon with an action ( free action or bonus action ). If your next attack successfully hits your opponent with an iaijutsu strike, Deal 1d6 extra damage. You increase this damage by 1d6 per level. ( maxing at 10D6 ) You may use a Free action and/or a Bonus Action to Draw or sheath your weapon. You can only use Iaijutsu Strike once per long rest. Damage from Iaijutsu Strike does not double from a critical. After making an iaijutsu strike or Iaijutsu Secondary Strike, You reduce your AC by –4 until your next turn.
You can only forgo Iaijutsu Secondary Strike once per turn. While your weapon is sheath, Your next attack is at advantage and adds critical hit equal to half your fighter level. When you declare an attack action an you weapon is sheath, you can forgo Iaijutsu Secondary Strike. Iaijutsu Secondary Strike also requires you to draw that weapon with an action ( free action or bonus action ). If your next attack successfully hits your opponent with an iaijutsu strike, Deal 1d6 extra damage. Damage from Iaijutsu Secondary Strike is doubled upon scoring a critical hit.
If you Hold your attack action using Iaijutsu Strike or a Iaijutsu Secondary Strike, You deal an extra 1d6 extra damage. Iaijutsu Strike and Iaijutsu Secondary Strike effects do not stack.
Terrifying Iaijutsu
Starting at 7th level, Your iaijutsu strike devastates the morale of foes that witness it. When you successfully hits with an Iaijutsu Srike or an Iaijutsu Secondary Strike, all foes within 30 feet must succeed at a Wis save (DC 10 + 1/2 Fighter class level + Cha) or become Frighten for 1d4+1 rounds.
Roaring Iaijutsu
At 14th level, your Iaijutsu strike deafens foes upon impact. When you successfully hits with an Iaijutsu Srike or an Iaijutsu Secondary Strike, all foes within 30 feet must succeed at a CON save (DC 10 + 1/2 Fighter class level + the STR) or be deafened for 1d4 minutes and they take 2d6 thunder damage.( damage Half upon successful save. Iaijustu Strike deals an additional 2d6 thunder damage )
Enlighten Iaijutsu Strike
Starting at 15th level, After making a Iaijutsu Srike or an Iaijutsu Secondary Strike, all you attacks deal extra damage equal to half your class level. Upon successfully landing an Iaijutsu Srike or an Iaijutsu Secondary Strike, All target within 30ft of you cannot make an attack of opportunity against you.
Ieyasu's Blessing
Starting at 18th level, You become a devastating Iaijutsu master. You Iaijutsu strike and your Iaijutsu secondary strike now scores a critical hit upon hitting a target. After landing an Iaijutsu Stirke, All attacks this round scores a critical hit and deal 1d6 extra damage that doesn't double on a critical hit. After landing an Iaijutsu Secondary Strike, all Attacks this round deals 1d6 extra damage that will double on critical hits.