Ninjas travell in disguise to other territories to judge the situation of the enemy, they would inveigle their way into the midst of the enemy to discover gaps, and enter enemy castles to set them on fire, and carried out assassinations, arriving in secret. Before disappearing into the night without a trace.

A ninja or shinobi was a covert agent or mercenary in feudal Japan. The functions of a ninja included reconnaissance, espionage, infiltration, deception, ambush, bodyguarding and their fighting skills in martial arts, including ninjutsu. Their covert methods of waging irregular warfare were deemed dishonorable and beneath the honor of the samurai. The ninja were stealth soldiers and mercenaries hired mostly by daimyōs. Their primary roles were those of espionage and sabotage, although assassinations were also attributed to ninja. Although they were considered the anti-samurai and were disdained by those belonging to the samurai class, they were necessary for warfare and were even employed by the samurai themselves to carry out operations that were forbidden by bushidō.

3rd Lv. Ninjutsu

The monk has gone through special intense training and gained advanced skills in the art of stealth and combat. Choose either acrobatics or stealth and gain expertise with that skill. The monk can treat all thrown property weapons as monk weapons, does not cost any action to draw or stow, and once per roll if you roll a 1 on the attack and damage roll, you can reroll the die and use the new number even if it is a 1. You are able to throw the weapon with the thrown property up to its maximum range without disadvantage.

The monk has also learned to utilize their ki in unique ways, almost imitating the effects of certain spells in order to enhance their capabilities. Any effect that requires a spell save DC uses your monk's ki save dc instead and if it requires a spell casting modifier then you may use wisdom as your spell casting modifier. 

Henge no Jutsu- Spend 1 ki point to cast the Alter Self . At level 11, you may spend 2 ki points your alter selfs natural weapons deal damage based upon your monk's martial arts dice and you gain +2 to your unarmed and natural weapons attack and damage rolls. If you use the change appearance feature and you use this feature to change your race, then you may lose your racial traits and gain the new racial traits until the spell ends.Your aquatic adaptation can become aerial adaptation allowing you to gain features to grant you a flight speed equal to your movement speed. 

Genjutsu- Spend 1 Ki point to cast a Silent Image  spell without the material components. At level 11, you can spend 2 ki points to cast Major Image .

Bunshin no Jutsu- By spending 2 ki points, the monk can cast the Mirror Image  spell. At level 11, you can spend 3 ki points to have your illusionary doubles move independently from your character. If an enemy targets you for an attack and you succeed in your roll to have them target one of your mirror doubles, you may change positions with one of your illusionary doubles. 

Kenjutsu- Spend 2 ki points to cast the Shadow Blade  spell and as long as you maintain concentration of the spell it does not cost you any action to resummon it. At level 11, you may spend 3 ki points in order to wield 2 shadow blades wielding one in each hand at once while concentrating on this spell.

6th Lv. Ki Enhancement

The monk has become more skilled in manipulating their ki and the ki of others. The monk uses ki to enhance their physical capabilities while using ki to disrupt the flow of ki in others.

Whenever the monk uses the flurry of blows feature as their bonus action, if they are wielding a monk weapon with the light property, then they can make 2 weapon attacks instead of unarmed attacks.

Whenever the monk uses the patient defense feature as their bonus action, if an enemy attacks and misses, then the monk can make either a weapon or unarmed attack against that attacking enemy.

Whenever the monk uses the step of the wind feature as their bonus action, when they finish performing their disengage or dash action, the monk can perform the hide action as part of the same bonus action

If the monk attacks an enemy with their stunning blow and the attack hits but fails to stun the enemy, then that enemy can not perform any opportunity attacks and any reactions until the end of their turn.

11th Lv. Master of Illusion

The monk is able to cast any of the following spells without material components and/or without using a spell casting focus. You can only cast any of the spells up to half your proficiency bonus (rounded up) before needing to take a long rest to regain all uses of this feature. Greater Invisibility/ Pass Without Trace/ Phantasmal Force.

Your illusions are infused with your ki energy making them seem more solid and real even to those who are experts in seeing through illusions. If any target tries to see through your illusions and they have a spell, feature, feat, and/or skill to see through illusions such as truesight or see invisibility spell, then they must make an intelligence (Investigation) skill check against your monk's ki save DC and if they fail, then they are subject to the full effect of the illusion. They can spend an action on subsequent turns to once again make an Intelligence (Investigation) skill check to see threw the illusion.

17th Lv. Jonin Master

Due to years of dedicated intense training and a multitude of experience in various wars, infiltrations, assassinations, and battles you have mastered the art of shinobi to its pinnicale.

Your Dexterity and Wisdom scores increase by 4. Your maximum for those scores is now 24.