Its built to help you format your custom cards like a real Magic: The Gathering card: mana cost, type line, rules text, power/toughness, and all the layout choices that keep your creation readable
I dont think this is too much of a hoop to jump through if you plan on using the land anyway especially with White centric untap effects or even just vigilant creatures to keep some pressure on
While it does require a fair few cards to execute, it could be the real deal
Both create mana as they do so, but Mishra's card make temporary mana, and Urza's permanent, in the form of Powerstone tokens
It changes only how you may pay those costs
For , Jeska's Will is a sorcery with two modes: you can either exile the top three cards of your library, with the option of casting those cards until end of turn, or you can add an amount of equal to the number of cards in target opponent's hand