With Serum Visions you draw a card, and then scry your next 2, getting to put them on top in any order, or move 1 or both to the bottom of your library
But its still a powerful card
Foul-Tongue Shriek can also take someone out by burning someone for each attacking creature you control while gaining that much life to keep you in the game.
The only obligation you really have to the online universe here is to finish the current match youre in
Full Commander support including partner and background pairings
The four decks coming back are "Devour for Power" (helmed by The Mimeoplasm), "Built from Scratch" (the Daretti, Scrap Savant deck), "Wade into Battle" (with Kalemne, Disciple of Iroas leading the charge), and "Breed Lethality" (with everyone's favorite proliferator, Atraxa, Praetors' Voice)