"Queen's Knight" + "Jack's Knight" + "King's Knight" A Fusion Summon of this card can only be done with the above materials. Once per turn, when a Spell/Trap Card, or monster effect, is activated that targets this face-up card on the field (Quick Effect): You can discard the same type of card (Monster, Spell, or Trap); negate the effect.
If this card is in your hand or GY: You can send 1 "Queen's Knight", "King's Knight", and "Jack's Knight" from your hand and/or face-up Monster Zone to the GY; Special Summon this card. This card gains 500 ATK x the combined number of cards in both players' hands. You can discard 1 card; destroy all face-up cards your opponent controls with the same type (Monster, Spell, or Trap) as the discarded card.
If you control no other monsters: You can Tribute this card; take 2 different monsters from your Deck among "Queen's Knight", "King's Knight", and/or "Jack's Knight", and either add to your hand or Special Summon each monster. You can only use this effect of "Imperial Bower" once per turn.
Discard 1 card, Special Summon 1 "Queen's Knight" from your Deck, add 1 "King's Knight" or "Jack's Knight" from your Deck to your hand, then, immediately after this effect resolves, you can Normal Summon 1 monster. You cannot Special Summon monsters from the Extra Deck for the rest of this turn, except LIGHT Warrior monsters. During the End Phase, if this card is in your GY: You can target 1 LIGHT Warrior monster in your GY; shuffle it into the Deck, and if you do, add this card to your hand. You can only use each effect of "Joker's Straight" once per turn.
Fusion Summon 1 LIGHT Warrior Fusion Monster from your Extra Deck, using monsters from your hand or field as Fusion Material. If you control "Queen's Knight", "King's Knight", or "Jack's Knight", you can use 1 monster from your Deck as Fusion Material. You can only activate 1 "Face Card Fusion" per turn.
I like that idea, buy two or three of the deck, 2 copies of the monsters, 2-3 copies of the card that summons them, and use gold sarcophagus or yugi's skill to make sure you get Slifer in hand, and with a 🔥 tonne of back row, it could work.