There are a few overarching observations that can be made about all four decks
Song of Blood is an ideal representative of this darling genre: +4 damage per attacker is an obscene amount of burst damage if you can fluke (or engineer) the best-case scenario
Prologue to Phyresis, Infectious Inquiry, and Vraska's Fall I've talked about Prologue to Phyresis a bit here and there, so at this point I think you know where I stand on it
The Darkness Crystal instead screws up your opponents graveyard shenanigans and otherwise steals their cards from exile
Plaxcaster Frogling Shroud is a strong ability to have on tap, and Plaxcaster Froglings graft ability can set up a key creature with some much needed on-demand protection
"Originally when WOTC signed a deal with Carta Mundi, the printing company, they agreed to print 10 million cards total for the Limited Edition sets, so that included Alpha and Beta," explained Jones