Deluge of Doom

Most black board wipes pay for their symmetry with a fixed toughness reduction and a flat rate; this one instead scales its kill range off how deep your graveyard runs. The X is not a mana investment or a life payment but a count of card types sitting in your yard, so an early cast off an empty graveyard clears almost nothing, while a mid-game cast (after a creature or two has died and an instant, an artifact, and an enchantment have found their way down) can push toward -4/-4 or beyond, enough to answer most of a board. That inversion of the usual wrath economy is the whole design idea: the spell rewards the exact position a graveyard-fueled black deck wants to be in anyway, and the fill-your-yard-then-punish sequencing lines up with delirium-style deckbuilding, where spreading across card types is already the goal. The scaling has a real cost, though. The effect is dead early, and the wipe stays fully symmetric no matter how large X grows: your own creatures shrink by the same margin as everyone else's. The edge, when it exists, is not in the wipe hitting others harder but in building around it, running few enough creatures (or big enough ones) that a -5/-5 sweep leaves your side standing while the table gets cleared. It sits in the lineage of graveyard-diversity payoffs that reward a varied yard over raw card count, using the sorcery-speed reset as the reward for stocking that yard first.