The Way of Ocean Breathing is an ancient martial art developed by monks who believed each of the Eight Seas possessed its own spirit and philosophy. Through disciplined breathing patterns, a monk channels the essence of a particular sea, altering their fighting style. Each form excels in different situations, allowing an Ocean Breathing monk to adapt like the tides.

Eight Sea Forms

As a bonus action, you enter one Sea Form, which lasts for 1 minute or until you choose another. You may switch forms as a bonus action.

Each form grants a passive benefit and a technique you can use by spending 1 Ki Point.

The Sapphire Expanse

"Water without resistance."

Passive

• Your movement speed increases by 10 feet.
• Opportunity attacks against you are made with disadvantage.

First Form:

Sapphire Current Slash

1 Ki points

Immediately after taking the Attack action:

• Move up to half your speed without provoking opportunity attacks.
• Make one additional unarmed strike.
• If it hits, add your Martial Arts die as extra cold damage.

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The Sea of Shattered Crowns

"Every kingdom eventually falls."

Passive

Once per turn, when you hit a creature wearing armor or using a shield, add your Wisdom modifier to damage.

First Form:

Crownbreaker Fist

1 Ki points

One attack deals:

• Two Martial Arts dice extra bludgeoning damage.
• Target must succeed on a Strength save or be knocked prone.

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The Whispering Tide

"Strike where no one hears."

Passive

You gain proficiency in Stealth if you lack it.

While in dim light or darkness:

• Your speed increases by another 10 feet.

First Form:

Silent Wave

1 Ki points

Teleport up to 20 feet to an unoccupied space you can see.

Immediately make one unarmed strike.

If the target hasn't taken a turn yet this round:

• Advantage on the attack.

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The Ember Sea

"The sea burns hotter than the forge."

Passive

Once each turn:

Your first hit deals extra fire damage equal to your Wisdom modifier.

First Form:

Scalding Surge

1 Ki points

After hitting:

• Deal an additional two Martial Arts dice fire damage.
• Target cannot take reactions until your next turn.

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Leviathan Reach

"Even mountains sink."

Passive

You count as one size larger for:

• Grappling
• Shoving
• Carrying capacity

First Form:

Leviathan Crash

1 Ki points

Hit a creature.

It must make a Strength save.

Failure:

• Knocked prone
• Pushed 15 feet

Large or smaller creatures instead take additional force damage if they cannot be pushed.

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Veilwater Sea

"Reality bends like water."

Passive

Advantage on saving throws against spells.

First Form:

Veiled Reflection

1 Ki points

Until your next turn:

The first attack that hits you has disadvantage.

If it misses:

You may immediately move 15 feet without provoking opportunity attacks.

Ironwake

"Stand like the cliffs."

Passive

While you are not incapacitated:

Gain +1 AC.

First Form:

Iron Tide Counter

2 Ki points

As a reaction after taking damage:

Reduce damage by:

Martial Arts die + Wisdom modifier + Monk level.

If reduced to 0:

Immediately make an unarmed strike.

Sea of Endless Stars

"The sea reflects heaven."

Passive

Your unarmed strikes count as magical (if they don't already).

Whenever you spend Ki:

Gain temporary HP equal to your Wisdom modifier.

First Form:

Falling Star Strike

3 Ki points

One attack deals:

Three Martial Arts dice radiant damage.

If the creature is concentrating:

It makes the Constitution save with disadvantage.

Tidal Mastery

Whenever you switch forms:

Choose one:

• Gain temporary HP equal to your Monk level.
• Move up to half your speed.
• End one of the following on yourself:
  • Charmed
  • Frightened

Additionally:

Once per turn when you hit with a Form Technique:

Regain 2 Ki points.

Sea's Dominion

Sapphire

Walking on water costs no movement.

Shattered Crowns

Critical hits against objects and constructs deal double damage.

Whispering Tide

Invisible creatures do not gain advantage against you.

Ember Sea

Fire damage ignores resistance.

Leviathan Reach

Creatures grappled by you are restrained.

Veilwater

You have resistance to spell damage.

Ironwake

Cannot be knocked prone.

Endless Stars

Gain resistance to radiant and necrotic damage.

Avatar of the Eight Seas

As a bonus action:

Spend 5 Ki points to awaken your final state for 1 minute.

During this time:

• Gain all eight passive benefits simultaneously.
• Your movement speed increases by 20 feet.
• You gain a swimming speed equal to twice your walking speed.
• You can breathe underwater.
• Once on each of your turns, you can use one Sea Form technique without spending Ki.
• When you reduce a creature to 0 hit points, you may immediately switch to another Sea Form without using a bonus action.

Final Form: Ocean Breathing, Eighth Tide — Horizon of the Endless Deep

Once during Avatar of the Eight Seas, you may unleash the culmination of all eight seas.

As an action, choose any number of creatures you can see within 30 feet.

Each creature must make a Dexterity saving throw against your Ki save DC.

On a failed save, a creature takes:

• 10 Martial Arts dice damage, divided equally as cold, fire, force, radiant, and bludgeoning (rounded as needed).

It is then subjected to one of the following effects of your choice:

• Knocked prone.
• Pushed up to 30 feet.
• Unable to take reactions until the end of your next turn.
• Blinded until the start of your next turn.

On a successful save, the creature takes half damage and suffers no additional effect.

Once you use Horizon of the Endless Deep, you cannot use it again until you finish a long rest.