This plays into the flavor of white making rules that restrict what others are able to do (aka taxation)
Prophet of the Peak could also be a solid addition to most GU/x decks since its bigger than most everything, doesnt care whether youve found your splash color(s), and helps find what you need next
While there may be other cards that offer similar effects, Dragon Tempest's efficiency and flexibility make it a strong contender for inclusion in such a deck, especially if the strategy revolves around Dragons entering the battlefield frequently
In fact, Id say youre more likely to lose from a lack of ramp than an excess try and over-index on big threats or at least play enough draw spells to find the ones you have so you can slam the door shut decisively once theyre online
This feels like a, "meat and potatoes" card, that'll help glue some decks together or sit in a sideboard for that crucial matchup
This model became the standard for Magic: The Gathering expansions and began the concept of "block rotation"