ADSEV

There really isn't a main character of this deck. You can win with the Ashened, Volcanic, or Diabell/Snake-Eye package and they all can play into each other. Only important thing to consider is to save your Ashened package for last because it will lock you out of the non pyro extra deck monsters.

You can look up any of the old Snake-Eye combo videos to understand the Snake-Eye package. You're basically just summoning a million things to link climb and end up with your pyro monsters on the field or in the graveyard. 

Volcanic is pretty cool in this deck because it basically puts volcanic bodies on the board or in the graveyard. When you end up with volcanics on the board you can use them to link climb or fusion summon via your ashened package or super poly package. When they're in the graveyard they're volcanic emperor targets. 

Ashened is the one that will throw your opponents for a loop since nobody knows how Ashened works or pays attention to it. Fusion Veidos wipes backrow, can't be destroyed by card effects or targeted by monster effects, quick effect destroys a face up card, and gains 500 attack for each material used to summon it when summoned by the Endlessness trap. Super Poly really messes people up with the Ashened package because the field spell causes all of their monsters to be targets for summoning the pyro fusion monsters. 

There are multiple recycling effects in each package that set you up for grind game if things get dicey.