The original duals would just be better, and why would you ever use anything else anyway
As you can see from the above lists, Rainbow Rares made their first appearance in the Sun & Moon base set, back in 2017
Given how unforgiving the tempo of Constructed can be, my first recommendations will be those battles that front load their value with strong ETB effects with an extra nod if it seems plausible to defeat it and get the backside
But that was no good either
Wall of Omens FINAL FANTASY: Through the Ages, Uncommon Limited: 3.5 The Imperial City of Arcades (Wall of Omens) is a fine early play, and any defensive deck will be thrilled to slot it in
Court of Garenbrig Court of Garenbrig is an exceptional Magic card because it gives you the monarch so early, as soon as turn 2 with a dork