Of course, this includes your own
This set gallery spans Diamond & Pearl - HS Unleashed (DP1-L2), roughly being 3 and a half years worth of cards
You can look at the top card of your library anytime, and if its something you want to cast, just sacrifice a nonland permanent and pay the top cards mana cost
Remember how I said it contained almost every part of the film engine
Its ultimate gives you an emblem which has you return artifacts from graveyard to the battlefield on the end step
A 2 mana 2/2 creature that can be played in response to a fetchland like Wooded Foothills, a watered down version like Fabled Passage or Terramorphic Expanse, a ramp spell like Three Visits, or another means of cheating cards into play like Kodama of the East Tree in order to ramp out one Plains card from your deck is already good value