Spectre can make one melee attack against every creature within 5 feet, using a separate attack roll for each target.

Spectre can spend 1 ki to become invisible and resistant to all damage for 1 minute.

Spectre makes one additional attack when he takes the Attack action and one additional attack when he uses Flurry of Blows. He can also use an action to make one melee attack against every creature within 5 feet, with a separate attack roll for each target.

As an action, Spectre enters a state of autonomous focus. While active, Deflect Missiles requires no action, he has advantage on Dexterity-based attacks, Dexterity saving throws and checks, and gains the benefits of the Alert feat. Creatures have disadvantage on melee attacks against him. His movement speed doubles and his jump distance triples. His attacks and Flurry of Blows gain four additional attacks, and these benefits require no ki. He regains all ki when entering the state, loses 1 ki at the end of each round, and must make a Constitution saving throw each round after reaching 0 ki. On a failure, the state ends, he gains 4 points of exhaustion, and takes 10d10 necrotic damage.

As a bonus action, Spectre can make two unarmed strikes after taking the Attack action.

Spectre can make three unarmed strikes as a bonus action. He can amplify the attacks with 1 ki to gain advantage on them.

Spectre can Dodge as a bonus action without spending ki, or spend 1 ki to make attacks against creatures that miss him while Patient Defense is active.

Spectre can Dash or Disengage as a bonus action without spending ki. He can amplify Step of the Wind with 1 ki to double his speed and triple his jump distance.

Spectre can spend 1 ki point to take a bonus action Dash, Disengage, or Dodge. His ki save DC is 19.

Spectre's unarmored movement increases his speed by 30 feet while unarmored and not wielding a shield.

Spectre can deflect or catch one ranged weapon attack. If he reduces the damage to 0, he can spend 1 ki point to make a ranged attack with the caught missile.

Spectre chooses the Way of the Spectral Attack, a custom monastic tradition focused on death defiance, amplified ki, spatial manipulation, and autonomous combat movement.

Spectre can slow his fall and reduce falling damage by 100 points.

Spectre gains proficiency in all saving throws. He can spend 1 ki point to reroll a failed saving throw.

Spectre can understand all spoken languages and make himself understood by any creature that understands a language. He can also become invisible and resistant to all damage for 1 minute by spending 4 ki points.

Spectre gains the ability to enter a timeless, ageless state. He no longer suffers the frailty of old age and does not need food or water.

Spectre gains the ability to speak directly with his mind to any creature within 60 feet that has a language.

When Spectre reaches 0 hit points or suffers an effect that would kill him instantly, he can make a Constitution saving throw with a DC of 10 plus the number of times he has dropped to 0 hit points. On a success, he regains hit points equal to 20 plus his Constitution modifier plus 12 hit points per ki point spent. On a failure, he can revive only by expending all remaining ki, otherwise the effect takes hold.

Flurry of Blows, Patient Defense, and Step of the Wind no longer require ki. Spectre can amplify Flurry of Blows with 1 ki to gain advantage on its attacks, amplify Patient Defense with 1 ki to attack creatures that miss him, or amplify Step of the Wind with 1 ki to double his movement and triple his jump distance.

Spectre knows the secret patterns of cities, including hidden passages, alleys, sewer routes, and places where the desperate can find shelter. He can move through urban environments quickly and locate a place to hide, rest, or obtain basic aid.