Sure, the mechanic popped up from time to time in supplemental products, but it wasn't really until Murders at Karlov Manor that it really got its big moment again
Fetchlands like Misty Rainforest are great ways to reset the top of your library to get a fresh look with The Fourth Doctor, but Id also recommend trying out cards like Bant Panorama and Shire Terrace which enter the battlefield untapped and tap for colorless mana in the early-game, and then you can cash in for a basic land and shuffle your library later when you need it
Sets in the same block usually drew from the same lore and were often tied together mechanically
See also: Singles buying guide, Pack opening strategy What products are available for Mega Evolutions? Three products at launch: Enhanced Booster Box (36 packs, $180-200 MSRP, exclusive Bulbasaur promo), Elite Trainer Box Riolu Edition (11 packs, $50 MSRP, exclusive Riolu promo), and Elite Trainer Box Alakazam Edition (11 packs, $50 MSRP, exclusive Alakazam promo)