Common, uncommon will happen 24.5% of the time
In addition, spells or abilities that check the characteristics of the discarded card can find that card in exile
Green and red have no shortage of large fight creatures
Its easier to pull off in EDH, where you have a slower format and plenty of ways to have a dedicated copy your own creatures deck
(the astute reader will have worked out that this means that half of the blind Predicts cast in my testing of the card have been hits which is well above the stated averages, this will come down over time, we have just been quite lucky thus far
Sapphire has plenty of powerful cards already, but before the Rise of the Floodborn Disney Lorcana release date on November 16, the meta was largely dominated by decks like Steel/Amber and Ruby/Amethyst Control