Honorable Mention #2: Tradewind Rider If this list were Top Ten Spirits for Standard, this would be a clear #1 since it dominated the era with multiple egregious decks like Trade-Geddon where you cast Armageddon and then bounced every new land with this, which I built, or Trade-Awake with Awakening to untap each turn all stuff for more bounces
Angel of Invention Angel of Invention is a Cube top end card that has shown as a 1- or 2-of in all sorts of builds in Modern that take advantage of it as a giant lifelinking flier
Then, place the rest at the bottom of your deck in any order
#8: Mana Drain Over Brainstorm
The many cheap burn cards in red helped get the hideous, woefully flawed, Jackal Pup through, for lots of damage, when the seemingly much stronger white version would be scared, sitting at home, for fear of tussling with a 2/2 first striker or simply a larger creature