First, let's look at Pokmon rarity symbols
For a lot of Final Fantasy fans, that is likely to be a character from the PlayStation era when the series exploded in popularity in the west: FFVII, FFVIII, FFIX (if you're a person of culture), bleeding into FFX on PS2
You get to exile your hand, draw that many cards, and then still play your exiled cards until the end of your next turn
Where a classic Magic: The Gathering card has a large portion dedicated to standardized elements specifically aimed at streamlining gameplay, these cards get wild
Also remember that if your cube is sleeved, then you'll need a bigger box to accommodate
And according to sites like MTGGoldfish and TCGPlayer, there are MTG cards from the set worth up to hundreds of dollars