Notion Rain

Two cards for three mana, with the life loss tuned to make that rate honest in a color pair that has always paid blood for cards. Black has drawn at a premium since the days of Night's Whisper and Sign in Blood, where the life total is the resource you trade for raw card advantage; this design folds the same bargain into Dimir and stacks surveil 2 on top, so the two cards you draw are not blind. The graveyard-filtering matters more than it reads. Surveiling before the draw lets you bin lands you do not need, set up the cards you do, and feed any payoff that wants cards in the yard, all before the draw resolves. The two damage is the throttle: it caps how often you can lean on the effect, especially in an aggressive metagame or a mirror where both players are spending life to dig, and it keeps a three-mana draw-two from being a free engine. The older life-for-cards spells were flat refuel and nothing else; here the surveil is not incidental smoothing tacked onto a draw spell but the half of the card that turns a refill into a tool for a graveyard-centric deck, where the cards milled are worth as much as the cards drawn.