With the new Boss, you can summon any Fiend monster, but be careful because there's a lock card, meaning you can only summon Archfiend monsters from the Extra Deck, and those Extra Deck Archfiend monsters are... *sobs* lmao lmao

Archfiend Gameplay Guide
Sections covered in this guide:
CORE
Archfiend Emperor (x1)




FIRE
7Archfiend Emperor
ATK:
2500
DEF:
1200
[ Pendulum Effect ] You can target 1 other face-up Spell/Trap on the field; destroy both it and this card. You can only use this effect of "Archfiend Emperor" once per turn. [ Monster Effect ] You can Ritual Summon this card with "Throne of the Archfiends". Must be Ritual Summoned. Unaffected by other monsters' effects while in the Extra Monster Zone. You can only use each of the following effects of "Archfiend Emperor" once per turn. If this card is Ritual Summoned from the Extra Deck: You can banish all monsters on the field, except in the Extra Monster Zones. If this card is in the Extra Monster Zone: You can Special Summon 1 Fiend monster from your hand, Deck, GY, or banishment.
Archfiend Matriarch (x0-1)




LIGHT
7
9Archfiend Matriarch
ATK:
2100
DEF:
2900
[ Pendulum Effect ] You can target 1 "Archfiend" Spell/Trap in your GY or banishment; destroy this card, and if you do, add that target to your hand. You can only use this effect of "Archfiend Matriarch" once per turn. [ Monster Effect ] You can Ritual Summon this card with "Throne of the Archfiends". Must be Ritual Summoned. Unaffected by other monsters' effects while in the Extra Monster Zone. If this card is Ritual Summoned: You can destroy as many Spells/Traps your opponent controls as possible, then if this card is in the Extra Monster Zone, you can banish all Spells/Traps from your opponent's GY. You can only use this effect of "Archfiend Matriarch" once per turn.
Matador Archfiend (x0-1)




DARK
6Matador Archfiend
ATK:
0
DEF:
0
You can Ritual Summon this card with "Ritual of the Matador". If this card is Ritual Summoned: You can add 2 "Archfiend" cards from your Deck to your hand, except "Matador Archfiend", also this card cannot attack for the rest of this turn. You can only use this effect of "Matador Archfiend" once per turn. Cannot be destroyed by battle, also you take no battle damage from battles involving this card. After damage calculation, if this card battled a monster: Destroy that monster, and if you do, inflict 1000 damage to your opponent.
If the searcher is summoned to the field with Ritual, and is holding it in their hand, it's a brick.
Royal Archfiend (x3)




FIRE
7Royal Archfiend
ATK:
2400
DEF:
1000
You can Tribute this card from your hand or face-up field; add 1 "Archfiend" card from your Deck to your hand, except "Royal Archfiend", also you cannot Special Summon from the Extra Deck for the rest of this turn, except "Archfiend" monsters, but you can Normal Summon 1 Fiend monster during your Main Phase this turn, in addition to your Normal Summon/Set (you can only gain this effect once per turn). When your Ritual Monster is destroyed by battle while this card is in your GY: You can Special Summon this card. You can only use each effect of "Royal Archfiend" once per turn.
This card can be sacrificed from your hand or field to search for another Archfiend monster/spell/trap from your deck to add to your hand (except for copies of this card).
Highness Archfiend (x1-3)




LIGHT
3Highness Archfiend
ATK:
1000
DEF:
800
If this card is Normal Summoned: You can banish 1 "Archfiend" card from your GY; add 2 "Archfiend" cards from your Deck to your hand, except "Highness Archfiend", also you cannot Special Summon from the Extra Deck for the rest of this turn, except "Archfiend" monsters. When your Ritual Monster is destroyed by battle while this card is in your GY: You can Special Summon this card. You can only use each effect of "Highness Archfiend" once per turn.
The deck's huge chokepoint, searches for two cards, and it's a LIGHT Fiend.
Duke Archfiend (x0-1)




WATER
4Duke Archfiend
ATK:
0
DEF:
2000
Gains ATK equal to its Level x 200. You can only use each of the following effects of "Duke Archfiend" once per turn. You can target 1 face-up monster you control that has a Level; send 1 "Archfiend" monster from your Deck to the GY, except "Duke Archfiend", and if you do, increase that monster's Level by the Level of the sent monster. When your Ritual Monster is destroyed by battle while this card is in your GY: You can Special Summon this card.
This card has the ability to select one monster on the field, then send an Archfiend monster from the deck to the graveyard and increase the level of the selected monster by the level of the monster sent to the graveyard.
Archfiend Heiress (x1)
brick when held in hand with handtrap
Archfiend Eccentrick (x0-1)




LIGHT
3
7Archfiend Eccentrick
ATK:
800
DEF:
1000
[ Pendulum Effect ] You can target 1 other Spell/Trap on the field; destroy both it and this card. You can only use this effect of "Archfiend Eccentrick" once per turn. [ Monster Effect ] You can Tribute this card, then target 1 monster on the field; destroy it. You can only use this effect of "Archfiend Eccentrick" once per turn.
classic
Archfiend Strategy (x1-3)




Spell
FieldArchfiend Strategy
Fiend monsters in the Extra Monster Zone(s) gain 1000 ATK. You can activate 1 of these effects; ● Banish 1 Fiend monster or 1 "Archfiend" card from your hand or GY; add 1 "Archfiend" card from your Deck to your hand, except a Field Spell. ● Add 1 "Archfiend" Pendulum Monster from your Deck to your face-up Extra Deck. You can only use this effect of "Archfiend Strategy" once per turn.
All Fiends in the Extra Monster Zone gain 1000 ATK (including enemy monsters).
Ritual of the Matador (Who is this guy???)




Spell
NormalRitual of the Matador
This card can be used to Ritual Summon "Matador Archfiend". You must also Tribute monsters from your hand or field whose total Levels equal 6 or more. You can banish this card from your GY; Special Summon 1 non-Ritual "Archfiend" monster from your hand. You can only use this effect of "Ritual of the Matador" once per turn.
Ohmmmmm, it uses the Matador Archfiend ritual, which allows it to banish from the graveyard to summon an Archfiend without using Ritual from its hand to the field.
Throne of the Archfiends (x1)




Spell
NormalThrone of the Archfiends
Ritual Summon 1 "Archfiend" Ritual Monster from your hand, face-up Extra Deck, GY, or banishment, by Tributing monsters from your hand or field whose total Levels equal or exceed its Level. During the Standby Phase, if you have "Archfiend Emperor" in your face-up Extra Deck: You can add this card from your GY or banishment to your hand. You can only use this effect of "Throne of the Archfiends" once per turn.
Summoning Ritual Archfiend from your hand (after searching), face up on your Extra Deck (after searching or returning to your field), or banishing it to the field is generally quite good. The conditions are also easy; you just need to Tribute a monster from your hand or field that is equal to or greater than your Ritual Level.
Archfiend's Usurpation (x3)




Spell
QuickArchfiend's Usurpation
Activate 1 of these effects; ● Set 1 "Archfiend" Trap from your Deck or GY. It can be activated this turn. ● Ritual Summon 1 "Archfiend" Ritual Monster from your hand or face-up Extra Deck, by Tributing monsters from your hand or field whose total Levels equal or exceed its Level. You can only activate 1 "Archfiend's Usurpation" per turn.
Peak, can only be activated once per turn.
Archfiend's Ghastly Glitch (x1-2)
Not once per turn: If you have a Fiend monster, play 1 card on the field and send 1 Fiend monster from your deck to the graveyard.
Archfiend Playtime (x0-1)




Trap
NormalArchfiend Playtime
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.
Archfiend's Fervor (x0-1)




Trap
ContinuousArchfiend's Fervor
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.
Target and negate one of your opponent's face-up cards if you have a Ritual Archfiend monster in the Extra Monster Zone.
Staple
Fiendsmith




LIGHT
6Fiendsmith Engraver
ATK:
1800
DEF:
2400
You can discard this card; add 1 "Fiendsmith" Spell/Trap from your Deck to your hand. You can target 1 "Fiendsmith" Equip Card you control and 1 monster on the field; send them to the GY. If this card is in your GY: You can shuffle 1 other LIGHT Fiend monster from your GY into the Deck/Extra Deck; Special Summon this card. You can only use each effect of "Fiendsmith Engraver" once per turn.




Spell
NormalFiendsmith's Tract
Add 1 LIGHT Fiend monster from your Deck to your hand, then discard 1 card. You can banish this card from your GY; Fusion Summon 1 "Fiendsmith" Fusion Monster from your Extra Deck, using monsters from your hand or field. You can only use each effect of "Fiendsmith's Tract" once per turn.




LIGHT
6Fiendsmith's Lacrima
ATK:
2400
DEF:
2400
2 LIGHT Fiend monsters Monsters your opponent controls lose 600 ATK. You can only use each of the following effects of "Fiendsmith's Lacrima" once per turn. If this card is Fusion Summoned: You can target 1 of your LIGHT Fiend monsters that is banished or in your GY; add it to your hand or Special Summon it. If this card is sent to the GY: You can shuffle 1 other LIGHT Fiend monster from your GY into the Deck/Extra Deck; inflict 1200 damage to your opponent.




LIGHT
4Lacrima the Crimson Tears
ATK:
1200
DEF:
1200
(This card is always treated as a "Fiendsmith" card.) If this card is Normal or Special Summoned: You can send 1 "Fiendsmith" card from your Deck to the GY, except "Lacrima the Crimson Tears". During your opponent's turn, if this card is in your GY (Quick Effect): You can target 1 "Fiendsmith" Link Monster in your GY; shuffle this card into the Deck, and if you do, Special Summon that monster. You can only use each effect of "Lacrima the Crimson Tears" once per turn.




WATER
D/D/D Wave High King Caesar
ATK:
2800
DEF:
1800
2 Level 6 Fiend monsters When a Spell/Trap Card, or monster effect, is activated that includes an effect that Special Summons a monster (Quick Effect): You can detach 1 material from this card; negate the activation, and if you do, destroy that card, then you can make 1 other "D/D" monster you control and this card gain 1800 ATK until the end of this turn. If this card is sent from the field to the GY: You can add 1 "Dark Contract" card from your Deck to your hand.




WIND
6Aerial Eater
ATK:
2100
DEF:
2600
2 Fiend monsters with the same Attribute If this card is Fusion Summoned: You can send 1 Fiend monster from your Deck to the GY. If this card is in your GY: You can banish 2 Level 6 or higher Fiend monsters with the same Attribute as each other from your GY, except "Aerial Eater"; Special Summon this card. You can only use each effect of "Aerial Eater" once per turn.




LIGHTFiendsmith's Requiem
ATK:
600
LINK-1
Link Arrow:
Bottom
1 LIGHT Fiend monster You can only Special Summon "Fiendsmith's Requiem(s)" once per turn. During the Main Phase (Quick Effect): You can Tribute this card; Special Summon 1 "Fiendsmith" monster from your hand or Deck. You can target 1 LIGHT non-Link Fiend monster you control; equip this card from your field or GY to that monster you control as an Equip Spell that gives it 600 ATK. You can only use this effect of "Fiendsmith's Requiem" once per turn.




Spell
QuickFiendsmith's Sanct
If you control no face-up monsters, or the only face-up monsters you control are LIGHT Fiend monsters: Special Summon 1 "Fiendsmith Token" (Fiend/LIGHT/Level 1/ATK 0/DEF 0), also you cannot declare attacks for the rest of this turn, except with Fiend monsters. If a face-up "Fiendsmith" monster(s) you control is destroyed by an opponent's card effect, while this card is in your GY: You can Set this card. You can only use each effect of "Fiendsmith's Sanct" once per turn.




LIGHTFiendsmith's Sequence
ATK:
1200
LINK-2
Link Arrow:
Bottom-Left
Bottom-Right
2 monsters, including a LIGHT Fiend monster During your Main Phase: You can Fusion Summon 1 Fiend Fusion Monster from your Extra Deck, by shuffling its materials from your GY into the Deck. You can target 1 LIGHT non-Link Fiend monster you control; equip this card from your field or GY to that monster you control as an Equip Spell with the following effect. ● Your opponent cannot target the equipped monster with card effects. You can only use each effect of "Fiendsmith's Sequence" once per turn.
1 Fiend monster = full Fiendsmith combo
Tour Guide From the Underworld (x3)
This card is a normal summon; you can summon a Level 3 Fiend monster from your hand or deck, but its effect is blocked (although blocked, the body still works fine; for example, Highness Archfiend is a LIGHT Fiend, which only blocks the effect on the field, and it can still activate in the graveyard).
Go with a tour guide.




DARK
3Djinn Demolisher of Rituals
ATK:
1500
DEF:
600
When you Ritual Summon a monster, you can banish this card from your Graveyard as 1 of the monsters required for the Ritual Summon. If a player Ritual Summons using this card, that Ritual Summoned monster cannot be targeted by the card effects of the other player.




DARK
3Buio the Dawn's Light
ATK:
1000
DEF:
1500
Monsters in your leftmost or rightmost Main Monster Zones cannot be destroyed by card effects. You can only use each of the following effects of "Buio the Dawn's Light" once per turn. If this card is in your hand: You can target 1 Fiend Effect Monster you control; negate its effects, and if you do, Special Summon this card. If this card is sent to the GY: You can add 1 "Mutiny in the Sky" from your Deck to your hand.




EARTH
3Fiendish Rhino Warrior
ATK:
1400
DEF:
900
Fiend monsters you control, except "Fiendish Rhino Warrior", cannot be destroyed by battle or card effects. If this card is sent to the GY: You can send 1 Fiend monster from your Deck to the GY, except "Fiendish Rhino Warrior". You can only use this effect of "Fiendish Rhino Warrior" once per turn.
Djinn : This card is the entire material for Ritual cards, obtained by banishing them from the graveyard. If this card is used as the Ritual material for any card, that card cannot be targeted by an opponent's card (it's quite good at resisting Imperm when your boss clears the field).
tiny MU up in the sky




DARK
8Luce the Dusk's Dark
ATK:
3500
DEF:
3000
3 Fiend and/or Fairy monsters in your GY Monsters in your leftmost or rightmost Main Monster Zones cannot be destroyed by card effects. You can only use each of the following effects of "Luce the Dusk's Dark" once per turn. You can target 1 card your opponent controls; send 1 Fiend or Fairy monster from your Deck to the GY, and if you do, destroy that card. If another card(s) you control is destroyed by card effect (except during the Damage Step): You can target 1 card on the field; destroy it.




DARK
6The Duke of Demise
ATK:
2000
DEF:
1700
2 Fiend and/or Zombie monsters Once per turn, during your Standby Phase, pay 500 LP or destroy this card. Cannot be destroyed by battle. You can only use each of the following effects of "The Duke of Demise" once per turn. During your Main Phase, you can: Immediately after this effect resolves, Normal Summon 1 monster. You can banish this card from your GY, then target 1 Level 4 or higher Fiend or Zombie monster in your GY; add it to your hand.




DARK
3Buio the Dawn's Light
ATK:
1000
DEF:
1500
Monsters in your leftmost or rightmost Main Monster Zones cannot be destroyed by card effects. You can only use each of the following effects of "Buio the Dawn's Light" once per turn. If this card is in your hand: You can target 1 Fiend Effect Monster you control; negate its effects, and if you do, Special Summon this card. If this card is sent to the GY: You can add 1 "Mutiny in the Sky" from your Deck to your hand.




WIND
6Aerial Eater
ATK:
2100
DEF:
2600
2 Fiend monsters with the same Attribute If this card is Fusion Summoned: You can send 1 Fiend monster from your Deck to the GY. If this card is in your GY: You can banish 2 Level 6 or higher Fiend monsters with the same Attribute as each other from your GY, except "Aerial Eater"; Special Summon this card. You can only use each effect of "Aerial Eater" once per turn.




Spell
NormalMutiny in the Sky
Fusion Summon 1 Fiend or Fairy Fusion Monster from your Extra Deck, by shuffling Fiend and/or Fairy monsters from your GY into the Deck as material. If this card is in your GY: You can send 1 Fiend or Fairy monster from your hand or face-up field to the GY; add this card to your hand. You can only use each effect of "Mutiny in the Sky" once per turn.
Fusion is done using materials from the graveyard, so it's very easy to match the materials to the monsters. The fusion method is shown in the image.
Videos & Combos
Aleister the Invoker (Combos)




DARK
4Aleister the Invoker
ATK:
1000
DEF:
1800
(Quick Effect): You can send this card from your hand to the GY, then target 1 Fusion Monster you control; it gains 1000 ATK/DEF until the end of this turn. If this card is Normal Summoned or flipped face-up: You can add 1 "Invocation" from your Deck to your hand.












































