Fire King is one of the best users of the new handtrap that came out with Masterduel's newest selection pack, Metal Raider's Dominance. "Pure" Fire King has been consistently topping TCG tournaments because of it's robust grindgame, power, and ability to host 24+ staple cards! Surely it can do the same on Masterduel ladder and burn away all opposition it comes across!
Since the "pure" version of this deck is relatively simple, I'm not going to write a gigantic strategy article on it. If you want a great guide on "pure" Fire Kings, I highly recommend Yacine656's video found here.
Fire King's end board usually consists of a set up Fire King Sanctuary, Fire King Island with at least two level 8s on board (to nuke your opponent's board with Garunix Eternity using Sanctuary's trigger effect) as well as a set-up graveyard full of follow-up. Your hand will also contain several handtraps to augment your board.
While the pure Fire King may seem deceptively simply and therefore, weak - it is surprisingly potent in Masterduel's meta. Nearly every card triggers float effects either from hand, deck or GY. Special summons can be played minimally in this deck to combat Maxx "C," or the deck can combo off with Promethean Princess -> Fire Link 4 fairly competently for a more powerful board. Fire Kings can also generate a ton of advantage and ATK power extremely quickly. The deck also has natural ways to combat the ever common backrow floodgates through Fire King Sky Burn. Fire King monsters on the field can also reliably dodge targeting effects because quick effect in-archetype cards like Sky Burn, Circle of Fire Kings and High Avatar Kirin all destroy your monsters.
When piloted correctly, Fire Kings basically has no "bad match-ups" in today's metagame, since it basically has answers to (almost) everything. Played "pure," Fire Kings might not have as much power as Snake-Eye, White Forest or Fiendsmith piles, but it makes up for it with its versatility, adaptability and grindgame. All in all, Fire Kings played as a "pure" deck remains a solid meta choice for Masterduel ladder!
GLHF Duelists!