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Xyz Mereologic Aggregator negates the effect of 1 face-up card on the field until the end of this turn

Many of the powerful Karakuri cards are separated from each other in completely different Boxes

Provided Decklist: Monsters: 9 ||| Dark Magician | Magicians Rod || Spellbook Magician of Prophecy ||| Magicians Souls Spells: 15 ||| Fusion Deployment || Spellbook of Knowledge | Upstart Goblin | Terraforming || Spellbook of Secrets | Soul Servant || Dark Magical Circle ||| Pacifis, the Phantasm City Traps: 16 ||| Phantasm Spiral Battle ||| Phantasm Spiral Power | Metaverse || Sea Stealth Attack ||| Eternal Soul || Fists of the Unrivaled Tenyi || Champions Vigilance Extra: 15 || Blue-Eyes Ultimate Dragon | The Dark Magicians | Dark Armed, the Dragon of Annihilation | Borrelsword Dragon | Selene, Queen of the Master Magicians | Knightmare Phoenix | Akashic Magician | Knightmare Cerberus | Proxy F Magician | Barricadeborg Blocker || Crowley, the First Propheseer | Linkuriboh | Relinquished Anima Deep Sea Convulsion of Nature Replays: If the embedded video does not work, click here to view the video on YouTube

any boss monster in their Deck, Maxx, Veiler, MST, Lance, Solemn, Bribe etc

You want him in the Graveyard to initiate the combos of getting 3 Monsters on the Field in a single turn

If a monster(s) is Special Summoned from the Extra Deck (except during the Damage Step): You can return to the hand or shuffle into the Deck, 1 "Ice Barrier" monster you control, then you can place 1 card from the field or either GY on the bottom of the Deck