Take the Darkrai Holo #105 from the Trick or Trade set, for example
Check out my channel: Top 8: Ding's Buster Blader Decklist Link: I picked Buster Blader because I thought it gave me a leg up against mono type decks, with the possibility of locking them out of the Graveyard or Extra Deck, the former being good against Zombies
Diversify your purchases across at least 2-3 different sets and, ideally, across different formats (booster box + ETB)
9 Call Of The Ring While self-contained, set-specific mechanics dont tend to perform well in the long run, the Ring tempts you looks set to buck that trend, by stacking up universally-useful passive abilities and granting them to any of your creatures
MTG-wise, it is kind of like most other recently developed Lord cards, though its expanded target range is immediately taken into account for its Final Fantasy flavor