Firebug

Firebug Features Level Features 3rd Bonus Proficiencies, Start Fire, Controlled Burn 9th Accellerant 13th Kindred 17th Collapse Zone

Bonus Proficiencies

When you choose this Archetype at 3rd level, you gain proficiency in the Survival skill and Alchemist's Tools.

Start Fire

Starting at 3rd level, you can use the Bonus Action granted by your Cunning Action to Start a Fire. When you make the Start a Fire Cunning Action, you can set a flammable object within your reach on fire. At the beginning of your next turn, the fire spreads to occupy the 5-foot cube of terrain where you initially set the fire.

At the start of each one of your turns while the fire persists, the fire spreads to nearby flammable objects. Roll your Sneak Attack dice. Rounded to the nearest number divisible by 5, the fire then spreads a number of feet equal to the amount rolled. You can choose what direction the fire spreads so long as the surfaces affected are flammable (or contain flammable objects within the 5-foot cube). An area where your fire has spread is difficult terrain. If a creature starts their turn in or enters the fire, they make a dexterity saving throw. On a failure, roll your Sneak Attack and deal fire damage to the creature equal to the amount rolled.

When you roll your sneak attack die using this feature it expends your use of sneak attack for the turn, refreshing at the end of the creature's turn. The DC for saves using this feature is equal to (8 + your Intelligence Modifier + your Proficiency Bonus).

Controlled Burn

Also at 3rd level, as an action, you can state that a number of 5-foot cubes equal to your intelligence modifier (minimum of 1) that you can see, or have seen in the last hour, are resistant to spreading fires. At the start of each of your turns when an encroaching fire is adjacent to one of these areas, make a DC 12 Intelligence save that increases by 2 at the start of each of your turns. On a failed save, the fire immediately spreads to any of your selected areas that are adjacent to the fire.

Once you have failed this save, you cannon use this feature again until you complete a short or long rest.

Accellerant

Starting at 9th level, you have access to chemicals or magic that accellerate the speed at which fire spreads. When you roll Sneak Attack to spread fire at the start of your turn, roll additional dice equal to each roll that results in a 6 and add them to the total.

For every 6 you roll using this feature, one of the 5-foot cubes can spread to a nonflammable surface.

Kindred

By 13th level, the devestation left by the fires you've caused has attracted the attention of forces unnatural. Wherever you go, fire recognizes you as a kindred spirit.

You become immune to fire damage, and you do not suffer ill effects from breathing in smoke and other secondary effects of fire.

Additionally, fire elementals can understand you even if you don't share a language, and you can make Charisma checks when communicating with fire elementals that aren't sentient.

Collapse Zone

When you reach 17th level, you can cause structures you've set on fire to collapse. As an action, you can select a structure that you've wholly engulfed in flames. The structure then collapses in on itself. Creatures inside or directly under the building take force damage equal to the structure's height in feet, and creatures within 10 feet of the Collapse Zone must make a dexterity saving throw, taking half the force damage on a failed save.