Gao the arsonist

yup this is here

hallowed

At third level, you learn the first of your sludge based abilities.

• Guillotine: As you hold your hands with thumbs touching and fingers spread, a thin cylinder of sludge shoots forth from your outstretched middle finger. Target creature must make a Dexterity saving throw. A creature takes 3d8 fire damage on a failed save, or half as much damage on a successful one.
• Sludgebath: Sludge covers the ground in a 15-foot circle centered on a point within range and turns it into difficult terrain for the duration. When the sludge appears, each creature standing in its area must succeed on a Dexterity saving throw or become grappled. A creature that enters the area or ends its turn there must also succeed on a Dexterity saving throw or become grappled. 
• Ignite sludge: When cast, Gao ignites all ignite sludge spells/toothjars. When sludge is ignited this way, it deals an extra 1d4 fire damage.
• Leech: Gao leaves behind some sludge on a surface such as a floor wall or ceiling.  When a target creature enters the Leech's radius, Gao can trigger it, causing the Leech to grapple the creature.
• Wineskin: Gao coats himself in a thick, viscous layer of sludge. Gives +4AC for 2 turns. Halves casters movement speed. Doubles fire damage taken.

communion

At 6th level, you learn the more powerful abilities available to you.

• What is this, sludge?:  You create a 30-foot-radius circle of flammable sludge, centered on a point you choose within range. The sludge spreads around corners. It lasts for the duration or until ignited, ending the spell, when ignited, any creature in the AOE must make a Constitution saving throw. The creature takes 5d8 fire damage on a failed save and becomes restrained until the end of its turn, or half as much damage and not becoming restrained on a successful one. One use per long rest.
• Trenchfoot: Burning sludge blasts from your feet, granting you explosive speed. For the duration(1 minute), your speed increases by 20 feet and moving doesn’t provoke opportunity attacks. When you move within 5 feet of a creature or an object that isn’t being worn or carried, it takes 1d8 fire damage from your trail of heat. A creature or object can take this damage only once during a turn. Three uses per long rest.

• Twisted vines: Twisted vines of sludge sprout from Gao's back, slashing at the target creature dealing 2d8 slashing damage.

Parousia

At 14th level, you are able to better utilize your abilities.

• Trenchfoot: Your heat trail now deals 2d8 damage.
• Twisted vines: This attack now deals 3d8
• Wineskin: When wineskin is active, should an enemy creature hit you, deal 3d8 damage to the enemy creature. 

This is the arsonist!

You caught me, I ran out of ideas here.