Necrogen Mists

The cruelty of this enchantment is that it taxes you too. Symmetrical discard bleeds the player holding cards, and a control deck that wants to bank answers ends up shedding its own resources at the same rate as its opponent. The trick is to flip that symmetry into a one-sided beating: pair it with a deck built to empty its hand early or to convert discards into value, and the upkeep tax falls hardest on whoever still has cards to lose. Hand-disruption shells thrived on that asymmetry, stripping the opponent down with targeted discard and then letting the mists grind whatever they fail to deploy each turn. The timing matters: the trigger fires during upkeep, before the draw step, so a player with an empty hand simply discards nothing and draws their card as normal. The tax does not lock anyone out of topdecks; it punishes hoarding, not drawing. That is what makes it a black card rather than a generic Howling Mine in reverse: the design tension every symmetrical effect carries is whether you can win the symmetry you impose, and black answers it in its own favor. It is the color that wants to dump its hand fastest, the color with madness and graveyard payoffs that turn a forced discard into a feature, and so the color paying the smallest real price for a tax it inflicts on everyone.