Authors note: You dont have to run graveyard hate in your decks if you really dont want to, but a lot of these cards are effective in a variety of different situations and they can save your bacon when youre up against more than just reanimated beaters
However, given the quantity out there, I think there will be a downward trend for these over time
Its hard for opponents to deal with the cascade trigger, so a cascade card is sort of like getting two cards for the cost of one
If youre insistent on hosing Auras in blue, Id suggest Evacuation, any Unsummon-type effect, Aura Flux, Kioras Dismissal, Aura Graft, Enchantment Alteration, or Fumble instead
Ideally, you'll be able to build up speed before casting The Speed Demon, but it works just fine if it starts your engine
Even if that creature is legendary, the Spirits would not enter the battlefield attacking