To join in this game, firstly, you have to finish the Tamamushi University Hyper Test, which was briefly published in a select number of magazines
I know 21 commander damage got decided on due to the original cycle of Elder Dragons having 7 power and you getting hit three times equaled 21 but the book quote is just so fitting for our format
Satellite Warrior X DARK Level 10 [ Warrior / SynchroEffect ] ATK 2500 DEF 2000 1 Tuner + 1+ non-Tuner Synchro Monsters If this card is Synchro Summoned: You can target cards your opponent controls, up to the number of Synchro Monsters in your GY
Duel Links who appear in Duel World (ZEXAL)
Fallout borderless Vault Boy reprints can be found in Collector Boosters as well, with a total of 9 borderless reprints in the Fallout art style available in non-foil, traditional foil, and surge foil
Banishing cards from your extra deck means you will not be using them for the rest of the entire game, but that should not be an issue if you are looking to end the game instantly