Omen Machine

Card advantage is the oldest axis of Magic, and this artifact does not slow it or tax it: it deletes the draw step as a concept and replaces it with a coin flip you have already accepted. Once it resolves, nobody draws. Every player's draw step becomes a forced reveal of the top card, with lands hitting the battlefield free and everything else cast for free if castable, otherwise lost to exile. The symmetry is the trick. A flat "players can't draw cards" effect would lock the game into a topdeck war; bolting the cast-for-free clause onto it turns that lock into a roulette wheel that hands out free spells to whoever built the better random outcome. The design tension it resolves is how to make a hard-lock effect generate action instead of stalling the board: it does so by converting raw card advantage into raw mana advantage, since the cost line on whatever you flip simply stops mattering. That favors decks with high curves and no use for cheap cantrips, and it punishes anyone whose library is stuffed with conditional spells that whiff on an empty board. It belongs to a small family of cards built to invert the very resource the game is organized around, and the asymmetry it rewards is entirely a function of how you stacked the deck before it ever entered play.