"Spellbook" cards focus on creating advantage, like raising a monster's ATK ("Spellbook of Power"), protecting monsters ("Spellbook of Wisdom"), or Xyz Summoning ("Spellbook of Life"), and manipulating the amount on the field, in the hand and in the Graveyard to activate effects
In addition, unless stated otherwise on the card, you can only have one copy of any card, excluding basic lands
Its time for Collectors Edition and World Championship cards to be officially recognized as tournament-legal cards for Magic: The Gathering play
Luffy (OP11-040) with a 52.9% win rate over 19,000+ games
Graveyard-heavy cubes: Rewards environments with varied card types going to graveyards
Even if those two things are foolproof safeguardssomething I doubtpeople would have a hard time believing that if their collections all go to zero