Usually, cards go by one of a few select levels: Common Uncommon Rare Super Rare The Super Rare category typically has the shiny foil you should be looking for, though you can take a look at the lower-righthand side of the card to make sure
Similar to the MTG X Assassins Creed Starter Kit, it features a Red/White Boros deck helmed by Cloud, Planets Champion, and a Blue/Black Dimir deck overseen by Sephiroth, Planets Heir
Then target player reveals their hand and discards all nonland cards with mana value equal to the number
That said, there are a number of factors that might make you consider small adjustments
Now Nekusar is a poor man's version of #2 below, but it's still powerful, has great colors to support its theme, and can be very nasty