The Monsters
There are 12 Fire King monsters - 11 Main Deck ones, and one Extra Deck monster.
We'll first cover the essentials of the Fire King engine, cards like Legendary Fire King Ponix and Sacred Fire King Garunix. Then we'll talk about extenders, mainly Fire King High Avatar Kirin and Fire King Avatar Arvata, and we'll end the Main Deck with the cards that see less play nowadays, for one reason or another.
We'll then switch to the Extra Deck and look at the final boss of the Fire King deck - Garunix Eternity, Hyang of the Fire Kings.
Keep in mind that most, if not all of the commentary will be focused on the card's usage nowadays; some cards had their time to shine through the archetype's history but now aren't as useful anymore. Some could be underpowered now, but future players might find a way to make them powerful. This is normal and is bound to change as the game evolves in speed and depth of effects and interactions.
Without further ado, let's start with the cutest member of the bunch - Legendary Fire King Ponix!