Two Steps Ahead
At level 1, you gain the Observation Attunement. Choose Brawl or Special techniques, and you can use either Intelligence or Wisdom as the modifier for those techniques. This choice cannot be changed later.
Additionally, you can add your full proficiency bonus to your Initiative check. When you roll for initiative, you can choose to roll with advantage a number of times equal to your proficiency bonus per long rest.
Autonomous Movement
Starting at level 3, your affinity for Observation Haki lets you read attacks before an opponent even knows they would make them. You can Dodge as a bonus action a number of times equal to your proficiency bonus per long rest. Additionally, when you successfully dodge an attack, you can immediately move up to 10 feet without provoking opportunity attacks.
Once per turn, when you would make an attack roll against an enemy with a lower initiative than you, you may choose to roll with advantage. You can do this a number of times equal to your proficiency bonus per long rest. Attacks of Opportunity made against you by creatures with a lower initiative count than you are always rolled at disadvantage.
Untouchable
Your ability to glimpse into the near future allows you to easily evade attacks. At level 6, you no longer provoke attacks of opportunity, and you can gain what are known as Foresight die, which is a d6. When an attack that targets you misses, or you succeed a saving throw to resist an effect, you gain one Foresight die, to a maximum equal to your proficiency bonus. When exiting or entering initiative, your Foresight dice reset to 0.
As a free action when you make a saving throw or are targeted by an attack, you may spend and roll a Foresight die, increasing your Save or AC by the number rolled. You may only use one Foresight die at a time when you use this feature.
Heightened Observation
At level 10, your tireless training has allowed you to effortlessly respond to incoming threats. When you would use a reaction granted by a technique that requires Observation Haki, you may spend a Foresight die to decrease its energy cost equal to the number rolled. Additionally, you may spend a Foresight die to grant an additional bonus to any AC or saving throw bonuses granted by feats, features, or techniques equal to the number rolled.
When an enemy within 10 feet of you misses an attack against you, you can use your reaction to make a melee attack against them. You can do this a number of times equal to your proficiency bonus per long rest.
Insightful Combatant
At level 13, you gain a bonus to your AC and saving throws equal to your Wisdom or Intelligence modifier (your choice) while you have at least one Foresight die remaining.
You can extend your predictive abilities to allies. Once per long rest, you can grant an ally within 30 feet the ability to add your proficiency bonus to their AC or saving throws for 1 minute.
Ultimate Response Time
You've reached the peak of Observation Haki foresight. At level 17, once per long rest, you can spend 4 Foresight dice as a reaction to being targeted by an attack roll or saving throw. When you do so, you can take an action, bonus action, and move as though it were your turn in initiative.
You gain an additional way to use your Foresight dice. As a reaction, when you are about to be hit by an attack, you can spend 2 Foresight dice to impose disadvantage on the attack roll.
Master of Prediction
At level 20, you gain a permanent Foresight die that does not count towards your maximum. This die is always available to you, regardless of how many other Foresight dice you have.
You can see the immediate future with perfect clarity. Once per long rest, you can declare that an enemy's attack will miss or your attack will hit without rolling.