In short, there's a big difference in how we produced a smaller game like the Transformer trading card game and a game as big as Magic
Sliver Gravemother Sliver Gravemother will benefit from cards such as Mirror Box and Helm of the Host as backup cards if it gets removed
From there, you can pair these flicker effects with cards like Peregrine Drake, Palinchron, or a basic land (in the case of Ghostly Flicker) for infinite mana, Overwhelmed Apprentice to mill your opponents out, or Venser, Shaper Savant to return all opposing permanents to their owners hands, just to name a few of the possibilities
Id push into mass removal such as Akromas Vengeance that will take out other permanents as well
encoaching dragonstorm did in fact register as Encroaching Dragonstorm, and that helps a lot when Im flying through a decklist trying to upload it as fast as possible