The genesis allows decks to reuse effects meaning that you can potentially free slots for other cards
C Common The Fang of Critias X SPELL (This card is also always treated as "Legendary Dragon Critias".) Send 1 Trap from your hand or field to the GY, that is listed on a Fusion Monster that can only be Special Summoned with "The Fang of Critias" (if that card is Set, reveal it), then Special Summon that Fusion Monster from your Extra Deck
For most WotC era sets, there are 10 or more videos of complete box openings on Youtube, which for the holos means approximately 1-2 sheets worth of cards in total, for rares around 2-3 sheets
This should assist in streamlining the entire card selling process for the average user
If the Dullahan was summoned using Lantern, then if they destroy Dullahan to get to Socuteboss, then you can just add back the Lantern to protect the Socuteboss from attacks and make another Dullahan next turn to repeat the process
Typically, this is where I talk about the Commander(s), which I will, but this idea began in reverse, so Bottoms up
