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This is a deck that centers around Archfiend Emperor, the First Lord of Horror, a 3000 ATK monster that has the ability to, once per turn, destroy a card on the field. Thanks to Call of the Archfiend, Archfiend's Roar, Archfiend Cavalry and Archfiend Emperor’s own effect, there are quite a few of ways to get this 3000 ATK monster on the field without having to Tribute Summon it.
You can Normal Summon Archfiend Emperor, the First Lord of Horror without Tributing, but, if you do, its original ATK and DEF are halved and it’s destroyed during the End Phase.
Even if Archfiend Emperor, the First Lord of Horror ends up in the Graveyard, you have multiple ways to bring it back (Archfiend Cavalry, Call of the Archfiend and Archfiend Roar).
Once per turn, by banishing an "Archfiend" card from your hand or Graveyard, Archfiend Emperor, the First Lord of Horror allows you to target a card on the field and destroy it.
You can banish another copy Archfiend Emperor, the First Lord of Horror from your hand or Graveyard to activate its effect and then use Escape from the Dark Dimension to Special Summon it. If you do want to run Escape from the Dark Dimension, then you might also want to consider playing Archfiend Empress.
You can use Doomdog Octhros to add Archfiend Emperor, the First Lord of Horror from your Deck to your hand.
If you control an “Archfiend” card, you can Special Summon Archfiend Commander from your hand. When Archfiend Commander is Special Summoned via its own effect, it destroys an “Archfiend” card you control.
If Archfiend Cavalry is destroyed by a card effect and sent from the field to the Graveyard, it allows you to Special Summon an “Archfiend” monster from your Graveyard, except Archfiend Cavalry. Use Archfiend Cavalry’s effect to bring back Archfiend Emperor, the First Lord of Horror.
You can also Special Summon Archfiend Cavalry from your Graveyard with Archfiend’s Roar. Archfiend Cavalry will be destroyed during the End Phase, allowing you to Special Summon Archfiend Emperor, the First Lord of Horror or Archfiend Commander.
Keep in mind that Archfiend Commander cannot attack the turn it’s Special Summoned via its own effect.
Lyla, Lightsworn Sorceress allows you to get rid of the opponent’s backrow while also potentially sending, during the End Phase of your turn, Archfiend Emperor, the First Lord of Horror and other “Archfiend” cards to banish for its effect from the top of your Deck to the Graveyard.
By discarding a Fiend monster, Call of the Archfiend allows you to target a Level 5 or higher Fiend monster in your Graveyard and Special Summon it. Use Call of the Archfiend to bring back Archfiend Emperor, the First Lord of Horror.
You can activate the effect of this Continuous Trap by discarding Sphere Kuriboh and Skull Meister.
Use Skull Meister to prevent your opponent from Summoning problematic monsters such as Ancient Gear Reactor Dragon and Yubel - Terror Incarnate. You cannot use Skull Meister to negate the effect of Secret Six Samurai - Fuma, but you can negate the effect of Diamond Core of Koa'ki Meiru and Survivals End right after your opponent banishes them from their Graveyard.
Use this Skill to increase your chances of opening with Archfiend Emperor, the First Lord of Horror and Call of the Archfiend or Archfiend Commander and Archfiend Cavalry.