The idea is that in a 100-card format, the math to simulate having four-of a card results in you running seven cards of the same functionality
Sorcery Until end of turn, creatures you control get +5/+5 and gain first strike, trample, and lifelink
Final Act gets rid of a lot, and for decks that rely on rad, poison, energy, or experience counters this is a serious reset
If we add White do our deck and go Naya, we open ourselves to even more noncreature-hate options to slow down our opponents: stuff like Gaddock Teeg, Eidolon of Rhetoric, and Thalia, Guardian of Thraben
Each deck of 100 cards is completely themed for the Final Fantasy set, from wholly new cards to re-flavored takes on already-existent Magic cards with new thematically appropriate art