There are plenty of discard synergy pieces in Red that make all our discarding even more powerful: we have plenty more ways to turn our cycling / looting into card advantage with Containment Construct, Conspiracy Theorist, Bag of Holding, Currency Converter, and Veronica, Dissident Scribe
For a very quick guide as to how much better snapcaster mage is than this you should look at all the decks in a meta where Snappy is legal which have blue mana in them and then look at which percentage of those decks actually play the Mage
All round the card is very good at getting things dead at all stages of the game and it has about as high a floor as you can hope for in an otherwise playable removal spell
Of course, you can also use an infusion-effect card as a decoy to cast "Lumaret's Favor" and reveal that this was the real threat all along
MacCready has never been reprinted since Universes Beyond: Fallout released in March of last year (and likely wont be, given the legal hoops of licensing IP), so its had the most to gain from this surge in demand
And finally, for those who seek the most luxurious form of universal power, the cosmic foil, textless version of The Soul Stone is for you
