Wildfire Knight

The Wildfire Knight
Pyromaniacs, firestarters, crazy flaming wretches. Wildfire Knights are forces of destruction, having made pacts with demons whose only purpose is destruction. What dicks. Naturally, there's probably some broody innate struggle in these knights between the desire to do good and the pulling of their demons to burn everything to the ground. Well, unless they don't care, which is equally fair but probably means they're the villain.



Hellfire Blessing
The Wildfire Knight starts their path of destruction power by making a pact with their demon patron! The creature possesses an object that will ever always find its way back to the knight, even if they throw it away. Through this object, the Wildfire Knight ever receives the Demon's power, at the cost of being egged into setting things on fire. At 8th level, the Wildfire Knight gains several benefits.


 * They have resistance to the first fire attack they receive each round.
 * They can start fires in absence of any tools.
 * If they have an enhancement to their weapon that deals additional fire damage, this enhancement deals an additional die of damage, and when they hit a creature with a weapon with such an enhancement, the creature catches fire, taking the additional damage each turn until they succeed at a Dexterity save (DC8 + Proficiency + the ability used to make the attack) or take an action to put the flames out. A creature can only be affected by one instance of flames at a time, regardless of multiple applications.

Flaming Rebuke
At this point, the demon realizes that if their new servant dies, they're a lot less useful than if they were alive, even if they get their soul. As such, they can respond viciously to any foe who dares try to strike them down. At 13th level, as a reaction when the Wildfire Knight is targeted by a melee attack action, they can deal 2d6 fire damage to the offending creature for every attack they are hit with.

WILDFIRE!!
The most powerful Wildfire Knights are in perfect sync with their demons and have come to reach an understanding - everything burns! At 18th level, when the Wildfire Knight uses the Attack action, they can expend this ability in order to have all of their attacks with that action target all creatures within 20'. In addition, the area within 20' of the Wildfire Knight is filled with flaming swords, lasting for one minute. Creatures other than the Wildfire Knight that enter the zone or end their turn inside take fire damage equal to their currently equipped weapon. The Wildfire Knight regains this ability when they take a short rest.