Esper Sentinel pips both Archivist of Oghma and Deep Gnome Terramancer to a spot on this list, and its because the latter two cards both require opponents making deckbuilding decisions we cant control
Once you've assembled plenty of Towns and other nonbasic lands, cast Omega, Heartless Evolution to turn the tides of battle
Being able to choose your opponents blockers doesnt just mean being able to surpass them, but also that you can get rid of pesky threats by forcing them to block creatures that can get rid of them
Force of Vigor, Leyline Binding, and Tarnation Vista have high prices for their unique abilities and artwork
They all win or lose together
This sixfold jump in value, nevermind the headline figure, has the community in a mix of shock, disbelief, and wondering just what the heck is up