If an effect instructs you to search your library for a basic land while you control Rootpath Purifier, you may search for any land card in your library
Many requested a return to a print-on-demand model, while others expressed their disappointment that they were not notified soon enough by Wizards of the Coasts alert emails
Final Fantasy Adventure Towns Ishgard, the Holy See, Jidoor, Aristocratic Capital, Lindblum, Industrial Regency, Midgar, City of Mako, and Zanarkand, Ancient Metropolis each have powerful effects with a range of costs
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Let's take a look at an example
Copying Sands of Times trigger with cards like Lithoform Engine or Strionic Resonator, in particular, can lead to infinite mana and infinite untaps