Spend 1 ki to become invisible, gain resistance to all damage except force damage, and move through creatures and objects as difficult terrain for 1 minute.

Spectre can use an action to end one effect on himself causing him to be charmed or frightened. He can also spend ki to end one poison or disease affecting him.

Spectre can understand all spoken languages and any creature can understand what he says. He can also use an action to make his speech comprehensible to any creature for one hour.

As an action, Spectre enters a heightened state of automatic movement. While active, Deflect Missiles requires no action, Dexterity-based attacks have advantage, melee attacks against him have disadvantage, he gains the Alert feat, has advantage on Dexterity checks and saves, doubles his movement speed, and triples his jump distance. If hit, he rolls a d20 and the attack misses if his roll equals or exceeds the attack roll total. His Attack action and Flurry of Blows each make four attacks. The state requires no ki expenditure for its features, grants him his full ki pool when entered, and drains 1 ki at the end of each round. With no ki remaining, he must succeed on a DC 19 Constitution saving throw each round or exit the state, gain four levels of exhaustion, and take 10d10 necrotic damage.

Make four unarmed strikes as a bonus action while Fluid Focus is active. The attacks deal 1d10 plus 5 bludgeoning damage each before other modifiers.

While unarmed or wielding only monk weapons and not wearing armor or using a shield, Spectre can use Dexterity instead of Strength for attacks and damage, roll a d4 for unarmed strike damage, and make one unarmed strike as a bonus action after attacking with a monk weapon or unarmed strike.

Spectre can use a bonus action to Dash or Disengage, and his jump distance doubles when using Step of the Wind.

Use a reaction to reduce ranged weapon damage by 1d10 plus 25. If reduced to 0, catch the missile. Spectre can spend 1 ki to throw a caught missile as part of the same reaction.

Make four attacks with monk weapons or unarmed strikes when taking the Attack action. While Fluid Focus is active, Spectral Attack grants four attacks and custom subclass features apply as described.

Gain proficiency in Strength and Dexterity saving throws, and choose two monk skills from Acrobatics, Athletics, History, Insight, Religion, and Stealth.

Spectre can spend ki points to use Flurry of Blows, Patient Defense, and Step of the Wind. His ki save DC is 19. He regains all expended ki after a short or long rest.

Spectre can make a monk weapon count as magical for overcoming resistance and immunity to nonmagical attacks and damage.

Spectre can use his reaction to catch or redirect missiles. He can also run along vertical surfaces and across liquids during his turn without falling during the movement.

When Spectre succeeds on a Dexterity saving throw against an effect that normally deals half damage, he takes no damage, and he takes half damage on a failure.

Spectre gains proficiency in all saving throws. When he fails a saving throw, he can spend 1 ki to reroll it and must use the new result.

Spectre becomes immune to disease and poison damage, and is unaffected by the effects of aging. He no longer needs food or water and does not suffer the frailty of old age.

Spectre gains a perfected form of martial mastery. His unarmed strikes deal 1d10 damage, he can make four attacks when taking the Attack action, and he can make four attacks with Flurry of Blows while Fluid Focus is active.

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 been dropped. On a success, he regains hit points equal to 20 plus his Constitution modifier plus 12 hit points per ki spent, up to his available ki. On a failure, he may revive by expending all remaining ki. If he has no ki or chooses not to revive, the triggering effect resolves normally.

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 so creatures that miss him can be attacked by him, or amplify Step of the Wind with 1 ki to double his movement speed and triple his jump distance.

Spectre gains one additional attack when he takes the Attack action and one additional Flurry of Blows strike. He can also use his action to make one melee attack against every creature within 5 feet of him, rolling separately for each target.

Spectre knows the secret patterns of city streets, alleys, rooftops, sewers, and hidden passages. He can find routes through urban environments that others overlook and can locate food, shelter, or information among the poor and forgotten.