With Saheeli, Radiant Creator you pay three energy to put a creature from the top four cards of your library onto the battlefield and deal 2 damage
While this can represent a single player board wipe in an ideal scenario, simply being able to take out all permanents of a color you arent playing can neutralize a lot of threats very efficiently
She dwells on Avernus, the first layer of the Nine Hells, but she believes that the Multiverse and all its treasures will one day be hers alone
While this halfling wont always hit the mark, if its played early enough, Archivist of Oghma can provide significant card advantage
We won't always be able to attack, but we can always draw some more cards with Rhystic Study, Mystic Remora, Esper Sentinel, Painful Truths, etc
Those were (and are) at the top of the metagame, and the concern was that their stifling effect on the rest of the metagame would grow and we'd see the Standard metagame becomes less diverse over time