Not only does this afford you with some versatility around your play style, it also virtually ensures you will find a one-cost character turn one no matter what
If you do well, you may get additional booster pack prizes
Money for Nothing: Since you get money rewards based on the strength of encounters (and you could give yourself stuff for free via stealing, catching thrown items, or poaching monsters, and then there are things like the item duplication glitch), enough grinding means you can have more money than the entire GDP of Ivalice as early as Chapter One if you really care to be that ridiculously wealthy
Double Masters also has one of the most exciting draft environments
Trading card games venerable granddaddy owes its popularity in part to the complexity of its mechanics, which in turn springs from the granularity of possible card actions
There will also be pirates and inventors with robots