The Dragon God

The great lord Io sleeps eternally within the vast Silent Sea, His colossal form lying dormant and still throughout the many aeons. Yet His formidable mind still exerts significant, albeit subtle, control over the realm of mortal dreams. One way or another, Io's consciousness has found yours, and you have entered into a pact with His Magnificence.

The Cerulean Warrior

At 1st level, you gain proficiency in martial weapons.

Ionian Metamorphosis

Starting at 1st level, the primordial power of Io begins to course through your veins, beginning to alter and change your form. As patches of diamond scales begin to emerge across your skin, your base unarmoured AC becomes 10 + Dexterity + Charisma.

Additionally, whenever you hit a creature with a melee weapon attack, you may roll an additional 1d4 and add the total to the damage roll. The die used increases to 1d6 at 5th level, 1d8 at 11th level and 1d10 at 17th level.

Titanic Blood

At 6th level, your body begins to echo the traits of the rare Titans of the Silent Sea. You gain one of the following benefits:

• The Hydra- Across your body, eight new pairs of eyes blink into existence, each one identical to your own eyes. You gain a +5 bonus to your passive Perception, and cannot be surprised.
• The Behir- The lower half of your body warps and contorts into something reminiscent of a  Behir- long, blue and serpentine, with three pairs of muscular reptilian legs. You lose the ability to ride other creatures (e.g. horse, wyvern, camel). You also gain a movement speed of 50 feet.
• The Kraken- Unbeknownst to those around you, your arms are not what they appear to be. As an action on your turn, you may lash out at a creature you can see within 10 feet of you. Your arm momentarily twists into a bundle of corded tentacles, lashing at the targeted creature. The target must make a Dexterity saving throw or take an amount of bludgeoning damage equal to your Warlock level. On a successful save, they take half as much damage.
• The Leviathan- Your lungs swell, and fibrous gills and fins appears across your body. You gain a swimming speed equal to double your walking speed, and can breathe water as if it were air.

The Behir

The lower half of your body warps and contorts into something reminiscent of a  Behir- long, blue and serpentine, with three pairs of muscular reptilian legs. You lose the ability to ride other creatures (e.g. horse, wyvern, camel). You also gain a movement speed of 50 feet.

The Hydra

Across your body, eight new pairs of eyes blink into existence, each one identical to your own eyes. You gain a +5 bonus to your passive Perception, and cannot be surprised.

The Kraken

Unbeknownst to those around you, your arms are not what they appear to be. As an action on your turn, you may lash out at a creature you can see within 10 feet of you. Your arm momentarily twists into a bundle of corded tentacles, lashing at the targeted creature. The target must make a Dexterity saving throw or take an amount of bludgeoning damage equal to your Warlock level. On a successful save, they take half as much damage.

The Leviathan

Your lungs swell, and fibrous gills and fins appears across your body. You gain a swimming speed equal to double your walking speed, and can breathe water as if it were air.

Empyreal Gaze

Starting at 10th level, your face changes to reflect the ancient visage of Io- six glassy blue eyes surrounding one larger eye. These eyes hold latent magical power, and can protect you from arcane attack. When you are targeted by a spell which requires an attack roll, you may use your reaction to reflect the spell back on its caster. You must make a Charisma saving throw, with the DC equal to 8 + the affected spell's level + the caster's spellcasting ability modifier. On a successful save, the spell is reflect back upon its caster.

You can only use this feature once per long rest.

Silent Denizen

Starting at 14th level, your transformation into a creature of the Silent Sea is complete. You gain the following benefits:

• You gain a swimming speed equal to your walking speed, and you can breathe underwater (if you chose The Leviathan option for your Titanic Blood feature, your swimming speed increases by 30 feet).
• Your size increases by one stage (e.g. from Medium to Large). You gain extra hit points equal to twice your Warlock level, and for every future level you gain an additional two hit points.
• You gain truesight out to 10 feet.
• Once per 10 days, you can use an action to transport yourself and up to eight other willing creatures straight to the Silent Sea, as if you had cast the teleport spell. Roll a d100 to determine where you arrive: 00-10, approximately 100 feet underwater, with land nowhere in sight; 11-40, approximately 10 feet underwater, with land approximately 100 feet away; 41-70, on the surface of the water, with land only a few feet away; 71-99, on land. Once used, you cannot use this ability for another 10 days.
• You lose the ability to communicate verbally. Instead, you can telepathically communicate with up to 12 creatures who are within 120 feet of you.