Older cards don't have a set code so, you need to know the symbol for each set to be able to tell on-sight, but a quick search over on Gatherer can help you out when youre not sure
The class cards are all great, and Im sure you can find one for your build
Accordingly, the best fair decks include some seriously unfair support cardslike Skullclamp, Umezawa's Jitte, the five swords, and Armageddon and its functional reprint Ravages of Warand the best unfair decks contain cards that increase consistency and contain avenues to victory that don't involve the cornerstone unfair cards in the deck
Getting caught by Mystic Snake often left decks in a much deeper hole than it looked like they were in, suddenly behind on all fronts and demoralized to boot
It allows you to recover from a variety of different types of sweepers, as long as theyd normally send your permanents to the graveyard