=Fire Kings=
Fire Kings are an Archetype of Fire Attribute Beast, Beast-Warriors and Winged-Beasts that focus on destroying themselves, and they have receive an insane boost in power due to the upcoming Structure Deck Reload: Onslaught of the Fire Kings that may just put them in the spotlight!
=Main Deck=
Foreshadowed in Circle of the Fire Kings, Legendary Fire King Ponix is finally here, this round birb is the best card in this Deck. On summon it fetches you any Fire King Spell/Trap paired with his effect to fly off your hand onto the field every turn when a card is destroyed means you can play on either player's turn, even turn 0 if you opened Kirin and another name! He recycles himself during the endphase if he was sent to the GY via card effect to prevent any funny shenanigans. We are pairing this lil fella with the new lore protagonist Diabellestarr the Dark Witch which we can fetch via "The Sinful Spoils Hunter Fiend" to get The Original Sinful Spoils - Snake-Eye which sends 1 card to summon our Level 1 Fire from the Deck! It should be noted Hunter Fiend and Sinful can recycle your stuff, this also opens interesting routes in case Snake-Eyes gets new support.
Fire King High Avatar Garunix has passed the torch to his successor, Sacred Fire King Garunix, this card like Ponix can special summon itself from your hand or GY if a card is destroyed, upon being summoned he can destroy ANY Fire Beast, Beast-Warrior or Winged-Beast monster on your Deck and if you do he gets half of the destroyed monster's ATK. This card enables cards like Fire King Avatar Arvata and Fire King Avatar Barong without having to destroy them from your Hand or Field, he can also pop Ponix giving you its recursion. Another target for its immolation is Fire King High Avatar Kirin which when destroyed and sent to the GY can summon any Fire King from your Hand or GY and then pop a card on the field, enabling Arvata or Barong's effects, and while in the hand this guy gets to during the main phase pop any Fire in your hand and field to summon itself. This synergizes with almost all of their cards that summon themselves upon something being destroyed which is great and helps with the swarming!
The Fire Formation - Tenki Trio, no there isnt a fourth Avatar! Anyways Fire King Avatar Arvata and Fire King Avatar Hanuman have mirror on field effects, negating Monster and Spell/Trap respectively, after this negate they got to destroy another Fire in the hand or field. They have 2 additional effects which have no relation to each other, Arvata gets to reborn a Fire King with its effects negated when destroyed and Hanuman can special summon himself from the Hand when anything is destroyed. Fire King Avatar Barong shares this last effect which gets him on the field easier, and during the next standby when he is destroyed he adds a Fire King card from the Deck, which is quite slow and makes him undersirable at 3, mostly at 1-2, since he does give you Ponix, Kirin or Hanuman access which is appreciated.
Sanctuary of the Fire Kings is your primary Ponix target, putting Island Turtle face-up on the field, Island basically blows up a card in hand to Reinforcement of the Army a Fire King from Deck or it can summon a Fire King if you control no monsters, note that if it leaves the field it blows up your cards. Sanctuary on the opponent's turn when they Special a monster lets you XYZ summon a Fire XYZ using cards you control as material, this Deck can access 8s and 4s, unfortunately most targets are undesirable.
Fire King Sacred Immolation shows Garunix eviscerating the last remaining Atlantean fans its an Swordsoul Blackout on steroids, blowing up monsters equal to the number of Fire Kings and then blowing your Kings too which can lead to some crazy snowball moments, it also has a niche protection effect. Circle of the Fire Kings allows you to cycle between your negates or just get stuff like Kirin or Garunix to trigger, its a good follow-up for the Deck.
=Extra Deck=
RGB gaming set-up Garunix or Garunix Eternity, Hyang of the Fire Kings is the Deck's sole Extra Deck monster, this R8NK on summon destroys all monsters on the board. Its other effect allows it to detach 1 card to pop a Spell/Trap gaining 500ATK when doing so. But the best effect of this card is that when it is destroyed its a Soul Charge reviving equal to the number of materials it had, meaning he can pull up via Sanctuary, blow a hole through the opponent's set-up and then bring back the main Decks from the GY if you pop it.
=Combo=
Legendary Fire King Ponix in hand: Normal Legendary Fire King Ponix > Ponix adds Sanctuary of the Fire Kings > Sanctuary places Fire King Island > Island destroys Ponix adding Sacred Fire King Garunix > Garunix summons himself and destroys Fire King Avatar Barong > next turn Ponix will come back to your hand and Barong will add Fire King Avatar Kirin.
From here you can either pop the Ponix with Kirin which will summon him making Eternity or if you have another name you can get the search from Ponix or the negate from Hanuman instead, the Deck is pretty free from and does amass resources very fast.