Aven Fateshaper

By the standards of card advantage, the activation does nothing: looking at the top four and rearranging them adds no cards to your hand and digs no deeper into the library. What it sells is repeatability. The enters trigger orders your next four draws once, and the activation lets you re-sort the top of the library every turn for the rest of the game, smoothing your draws and stacking your best card on top before any draw step or library-manipulation effect that cares what sits there. This is the high end of an early-era common design vocabulary of fortunetelling and library sculpting, the same impulse that produced cheaper cantripping rummagers, scaled up to a finisher-sized body and a permanent engine. Pure top-of-library control had always been a cheap-spell effect, priced to be cast and forgotten; stapling it to a hard-to-kill 4/5 flier converts a one-shot setup into a clock that also fixes your next several turns. The durdly first impression only lifts once the activation has run a few cycles. The rate is unmistakably built for a slower game, where seven mana for a recurring sort is affordable and the flier matters more for inevitability than tempo.