Demigod-Storm Breaker

Storm Breakers are masters of the ocean. They get that mastery from their connection to the divine.

When you chose this feat, you choose a god from the Tempest Domain as one of your ancestors or parents. You can’t choose another Feat with the word “Demigod” in it once you’ve chosen this one. You gain the following benefits at certain levels:

1st:

• You gain proficiency with Water vehicles and Navigators tools
• when you use your proficiency in Water Vehicles or navigators Tools, you add a D4 to the check. The D4 increases by one at 3rd, 5th, and 17th levels
• when you fish, you find twice as much as normal
• you can take the Dash action as a Bonus Action

3rd:

•  When you take Thunder, Lightning, Cold, or Bludgeoning damage, you can use your reaction to add a D12. Add your Constitution modifier, and reduce the damage taken by that much. The die increases by one at 3rd, 5th, and 17th levels 
• When you take the Dash action, your speed increases by 10 feet. This benefit only applies while you are Dashing. The bonus increases by 10 at 5th and 17th levels

5th:

• you gain resistance to Thunder, Lightning, Cold, and Bludgeoning damage
• when you are dashing, you can, as part of the same Action or Bonus Action, become a bolt of lightning. You teleport a number of feet equal to the maximum amount allowed with your Dash. Each creature in a line from the space you left to the space you are currently occupying must make a Dexterity saving throw or take Lightning damage equal to 10 times your proficiency bonus. Each creature within 30 feet of that line takes the same amount of Thunder damage and must make a Constitution saving throw or be deafend for one minute

17th:

• you gain Immunity to Thunder, Lightning, Cold, and Bludgeoning damage
• when you roll for Thunder, Lightning, Cold, or Bludgeoning damage, you can, as part of the same action, deal maximum damage. You can do so a number of times equal to your proficiency bonus, and you regain uses whenever you finish a Short or Long rest