78,122 total unique Magic card prints + total foil variants almost gets you to the final number
Iconic Cards: Counterspell, Ponder, Damnation, Jace, the Mind Sculptor Popular Decks: UW Control, Jeskai Control, Taking Turns, Esper Control 3 Midrange Midrange decks are popularly said to solve problems, not create them. In other words, these decks are sort of designed to be able to win against every archetype, although they wont bulldoze over anything (the way aggro often wrecks control, for example)
We wanted to take advantage of the fact that they were passed, and thus seen, so much by players
If you are relying on less well protected threats or more contained threats you want to keep in play like Sheoldred and Elesh Norn then Spellskite is a fantastic card for the job
Note decayed Elo is added back before games are played (meaning that the restored Elo is what will be used to determine rank changes for game outcomes).