Opponent Mill

Cards that grind an opponent's library into their graveyard, threatening to deck them out as a win condition. Glimpse the Unthinkable dumps ten at once, Ruin Crab mills three per land drop, Sphinx's Tutelage and Psychic Corrosion chip away every time you draw, and Fleet Swallower halves a library in one swing. Distinct from Self Mill, which loads YOUR OWN graveyard from your own library as a setup or fuel effect. Separate from Mill Payoff, which rewards a swollen opponent graveyard rather than filling it, and from Mill Doubler, which multiplies the amount milled rather than being the source.