SD Pulse of the King first reveals

[~British Soul~]

https://ygorganization.com/themasteroffaster/

Scar-Red Daemon / Scar-Red Dragon Archfiend
Level 8/DARK/Dragon/Synchro/Effect
1 Tuner + 1+ non-Tuner DARK monsters
You can only use the 2nd effect of this card’s name once per turn.
(1) This card’s name becomes “Red Dragon Archfiend” while face-up on the field or in the GY.
(2) If this card is sent from the Monster Zone to the GY: You can Special Summon 1 “Red Dragon Archfiend” from your Extra Deck (this is treated as a Synchro Summon), then, if this card was sent to the GY as Synchro Material for a DARK Dragon Synchro Monster, you can destroy all opponent’s Attack Position monsters.
3000/2500

Soul Resonator
Level 3/FIRE/Fiend/Tuner/Effect
You can only use the 1st and 2nd effects of this card’s name each once per turn.
(1) If this card is Normal or Special Summoned: You can add 1 Level 4 or lower Fiend monster from your Deck to your hand, except “Soul Resonator”, also you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except DARK Synchro Monsters.
(2) If a card(s) you control would be destroyed by card effect while you control “Red Dragon Archfiend” or a Synchro Monster that mentions it, you can banish this card from your GY instead.
500/200

Bone Daemon / Bone Archfiend
Level 4/DARK/Fiend/Effect
You can only use the 1st and 2nd effect of this card’s name each once per turn.
(1) If this card is in your hand or GY: You can send 1 other card from your hand or field to the GY; Special Summon this card, also you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except DARK Dragon Synchro Monsters.
(2) You can target 1 face-up monster you control; send 1 Fiend Tuner from your hand or Deck to the GY, and if you do, increase or decrease that target’s Level by 1.
1800/0