Dragonborn Knight

PREREQUISITE: TO CHOOSE THIS SUBCLASS, YOU MUST BE A DRAGONBORN

Dragonborn Knights are dragonborn warriors who wield their inner draconic might through their armaments, harnessing the elements to deadly effect. Some Dragonborn Knights revere the great dragons they're descended from, while others seek only to become the greatest of their kind. Dragonborn Knights follow a strict code of honor and rarely lie, demonstrating the greatest values of dragonborn society. The following are the rules they follow, called the Tenets of the Dragonborn

Tenets of the Dragonborn

• A Dragonborn Knight must not lie except in defense of one's allies
• A Dragonborn Knight must battle honorably, sparing their foes when possible
• A Dragonborn Knight must not partake in alcohol, as doing such clouds honorable judgement
• A Dragonborn Knight must value greatness, respecting the powerful
• A Dragonborn Knight must value freedom, being subservient to none but themself

Features by Level:

• Level 3: Draconic Physique, Dragon Strike
• Level 7: Avenging Lash
• Level 10: Dragon Form
• Level 15: Improved Dragon Strike
• Level 18: Draconic Ally

Level 3: Draconic Physique

Your body has taken on more draconic characteristics for a dragonborn. You gain the following listed benefits.

• Draconic Rend: You gain a Rend unarmed attack that deals 1d6 + your Strength modifier Slashing damage.
• Improved Breath Weapon: Your Breath Weapon deals an additional d10 of damage.
• Thick Scales: You gain a +1 bonus to armor class while not wearing heavy armor. 
• Unreal Strength: You gain advantage on Strength (Athletics) checks, and your carrying capacity is treated as if you were a Large creature. In addition, you can make melee weapon attacks as bonus actions, even while not dual-wielding.

Level 3: Dragon Strike

You can change the damage type of your melee weapon attacks to the damage type of your dragonborn Draconic Ancestry. In addition, You can cast Searing Smite a number of times per long rest without a spell slot equal to your Constitution modifier, using your Constitution as the spellcasting ability and changing the damage type to that of your Draconic Ancestry.

Level 7: Avenging Lash

When you or an ally takes damage from a creature within 5 feet of you, you can use a reaction to make a melee weapon attack against that creature. If it hits, you can cast your Dragon Strike's Searing Smite as part of the reaction.

Level 10: Dragon Form

As a bonus action, once per long rest, you can take on a draconic form. For one minute, while in this form, you have advantage on all attack rolls, and you grow draconic wings, granting you a flying speed of 30 feet. In addition, you gain 3d8 temporary hit points, which last even after the duration is over.

Level 15: Improved Dragon Strike

You can cast the Searing Smite from your Dragon Strike at will now, and it counts as being cast with a 3rd level spell slot.

Level 18: Draconic Ally

You can cast Summon Dragon once per long rest without a spell slot, using your Constitution modifier.