Elemental Knight

By harnessing the power of the elements you enhance your martial prowess. Those with these talents are often sworn to elemental lords of have made some manner of deal in exchange for these powers, though some do learn these talents through other means.

Imbue Strikes

Starting with you choose this archetype at 3rd level, as a bonus action, you may imbue your weapons with elemental power. Choose one of the following elements:

• Air. A creature attacked by your weapon cannot take reactions until the start of its next turn.
• Earth. Creature attacked by your weapon has to make a DC 12 Strength saving throw, or be knocked prone.
• Fire. Your weapon attacks deal additional 1d4 fire damage
• Water. Your weapon attacks deal cold damage. A creature attacked by your weapon has its speed reduced by 10 feet until the end of its next turn.

This effect lasts 1 minute. You can end the effect early on your turn as a bonus action. This effect ends early if you are incapacitated. Once you use this feature you can't use it again until you complete a short rest.

Emissary of Elements

At 7th level, you can speak, read and write primordial. Additionaly you have an advantage on Insight and Persuasion checks when dealing with elementals.

Primordial Ward

Starting on 10th level, when you or a friendly creature within 5 feet of you is dealt acid, cold, lightning, poison, or thunder damage you can use your reaction to halve that damage.

Vigor Burst

At 15th level, when you use your Second Wind feature, you may emit a blast of elemental energy that deals acid, poison, lightning, thunder, cold, or fire damage equal to the amount healed by second wind to all creatures within 5 feet of you.

Elemental Champion

Starting with 18th level, whenever you deal acid, cold, fire, poison, lightning, or thunder damage, increase that damage by an amount equal to your CON modifier. Additionally when you use your Action Surge feature to make an attack, that attack deals an additional 1d8 acid, cold, fire, poison, lightning, or thunder damage.