Sailor Style, Mystical Art

Mystical Arts Feat (Prerequisite: Level 4+, Martial Class[Fighter, Monk, Rogue, Barbarian].  You may only know one Mystical Arts Feat.)

Sailor Style
By using the mass ocean full of concentrated magic, you can empower your unarmed strikes with the magic by drinking said ocean water.  While, you will feel loopy, you will gain immense versatility and power.

You have an amount of Sailor Points equal to twice your proficiency bonus, you expend these for the abilities included in any Sailor Style ability.
You gain four vials that you regain all on a long rest and one on a short rest.  You may expend one as an Action or Bonus Action to gain one Sailor Point.

If you choose the unarmed option, you gain the following benefits,

• Unpredictability. As a reaction, you may add your proficiency bonus to your AC until the start of your next turn.  This does not cost any Sailor Points.
• Weight of the Ocean. You may spend one Sailor Point to deal additional damage on unarmed strikes for the next turn.  This additional damage is equal to your proficiency bonus and the damage type is Force for this additional damage. 
• Sudden Strike. On a missed attack roll, you may add 1d4 + half your proficiency bonus(rounded down) to the attack roll to potentially cause it to hit instead. 
• Strengthened Strikes. Your unarmed strikes become 1d8 + Strength or Dexterity(your choice)

Or,

You may imbue the style into your weapons, instead using the ocean magic to buff your physicals, yes, but also buff your weapons you use.  In doing so, you would be considered a Warlord.

If you choose the weapon option, you gain the following benefits,

• Unpredictability.  As a reaction, you may add your proficiency bonus to your AC until the start of your next turn.  This does not cost any Sailor Points.
• Weapon Arts.  You gain two weapon arts ability that can deals Cold damage instead of the weapons damage type.
• Enhanced. You may expend any number of Sailor Points to deal additional damage with your weapon arts.  Each point expended deals an additional 1d8 damage.  This damage type is Force or Cold, your choice.