This bardic subclass was inspired by a person looking for a fire-themed bard that doesn't involve dancing.
Because bards are big into the use of speaking or performing, I went with the idea of the charismatic preacher damning people to hell for their sins.
Rather than just being a spellcaster with a bunch of fire spells (you might as well play a sorcerer if that's the goal), I went with features of fire, intimidation, shaming, and sending creatures to the D&D versions of Hell.
Here's the link for the Demoralized condition.