Dreamborn Muse

The mill clock here scales to the thing players are usually trying to do: hold cards. The more options you keep open, the faster you grind yourself out, which inverts the normal incentive structure of a blue control deck and turns a full grip into a liability. Against an empty-handed aggro deck it does almost nothing; against a hand-hoarding draw-go opponent it becomes a genuine threat. That symmetry runs both ways, of course, including across your own upkeep, so the card asks its controller to dump cards faster than the table does. The design lineage is the small family of attrition engines that punish hand size rather than reward it (Black Vise on the artifact side, the various tax-on-cards effects), but this one is unusual for tying the penalty to a self-milling clock rather than direct damage, which makes it a mill payoff and a discard-incentive in one body. As a 2/2 for four it is fragile and slow, a Spirit that wants the game to go long enough for the cumulative milling to matter; the threat is not the creature but the math it forces on every hand kept too full for too long.