Thief of Sanity

Everything hinges on the combat-damage trigger, which makes this a wager before it makes anything else: the entire payoff is back-loaded onto connecting, so a fragile flier has to survive a turn cycle to pay off at all. Land a hit and the math inverts. Each strike is not card advantage in the usual sense; it is resource conversion stolen from the opponent's library, where you look three deep, exile the best card face down, and bury the other two. What you steal waits in exile, castable on any mana at all, and that clause does the heaviest lifting: an evasive aggressor doubles as a colorless engine that can fire off whatever it digs up regardless of your own manabase. Because the stolen cards live in exile rather than your hand, they dodge hand-size limits and most discard effects, and they accumulate: repeated attacks stockpile a reserve of the opponent's own threats to spend at leisure. The Specter lineage is built on exactly this bargain, connect with a small flier and tax the opponent for it. Hypnotic Specter forced a random discard from hand; this one reads into the library, keeps the single card it wants, and grinds the rejects into the graveyard, a far crueler edit. The whole thing lives or dies on whether the body sticks around long enough to attack, which is why it demands a board the opponent cannot profitably block and collapses the instant it can be killed in response.