Special Summon 1 Level 7 or lower "Archfiend" monster from your hand or Deck, or if you have an "Archfiend" Ritual Monster in your face-up Extra Deck, you can Special Summon up to 1 each of "Royal Archfiend", "Duke Archfiend", and "Highness Archfiend" from your hand and/or Deck instead. You can only activate 1 "Archfiend Playtime" per turn.
If you control an "Archfiend" Ritual Monster in the Extra Monster Zone: You can target 1 face-up card your opponent controls; negate its effects until the end of this turn. If this card is banished from the hand or field: You can add 1 "Archfiend" card from your Deck to your hand, except "Archfiend's Fervor". You can only use each effect of "Archfiend's Fervor" once per turn.
If you control a Fiend monster: Target 1 card on the field; destroy it, then, you can send 1 Fiend monster from your Deck to the GY.
Pay 500 Life Points, then target 1 "Archfiend" monster in your Graveyard; Special Summon that target. It cannot be Tributed. Destroy it during the End Phase of this turn.
You can target 1 Level 5 or higher Fiend monster in your GY; discard 1 Fiend monster, and if you do, Special Summon the targeted monster. You can only use this effect of "Call of the Archfiend" once per turn.
Tribute 1 monster; Special Summon 3 "Nightmare Archfiend Tokens" (Fiend-Type/DARK/Level 6/ATK 2000/DEF 2000) to your opponent's field in Attack Position. Each time 1 is destroyed, its controller takes 800 damage.
You can activate this card the turn it was Set, by revealing 1 "Red Dragon Archfiend" in your Extra Deck. Activate this card by revealing any number of monsters in your hand, then target Effect Monsters your opponent controls equal to the number of Tuners revealed +1; they lose 100 ATK for each card you revealed in the hand to activate this card, also their effects are negated. If the last of those monsters is not on the field, destroy this card. You can only activate 1 "Red Dragon Archfiend's Chain" per turn.
This turn, neither player can Special Summon monsters with the same card types (Ritual, Fusion, Synchro, Xyz, or Link) they already control. If you do not control 2 or more of the same card types (Ritual, Fusion, Synchro, Xyz, or Link), all Ritual, Fusion, Synchro, Xyz, and Link Monsters you currently control gain 500 ATK. You can only activate 1 "Simul Archfiends" per turn.