After trying numerous decks during the preview period, I got to see just whats different about the Final Fantasy set
Rainbow rares (sometimes referred to as Hyper Rares) sat at the top of this pile from their initial introduction in the Sun and Moon Base Set and are still popular in today's Sword and Shield sets
They allow deck filtering, smoothing out mana bases with shock lands and triomes, but they come at a price
Do not buy one if you want the lowest price per pack or the premium experience of Collector Boosters
It can just tutor up whatever artifact you want, and can cheat into play an expensive artifact, like Metalwork Colossus, this can just go grab anything from your library and put it onto the battlefield
With how often Urshifu has been featured on this list, it is likely no surprise to find him once again in the Alternate Art Secret Rare form near the top of the list