Skyshroud War Beast

The entire stat line is outsourced to your opponent's deckbuilding: a punishment card dressed as a beater. The design idea is to tax nonbasic lands, the manabase technology that lets a deck splash, fix colors, and run utility lands instead of vanilla Plains and Forest. Against an opponent leaning hard on dual lands and creature-lands, this arrives as an enormous trampler for almost nothing; against a mono-color basics-only build, it enters as a 0/0 and dies before doing anything, and that downside is what stops the rate from running away. The sharp part is that the count never freezes: power and toughness equal the chosen player's nonbasic lands as a continuous effect, recalculating in real time, so the body grows as they add more duals to the field and shrinks the moment one leaves. The creature reads as live commentary on the opposing manabase, not a single snapshot taken on entry: blow up their nonbasics and you watch it deflate, while the opponent who refuses to fetch a basic keeps feeding it. The card sits with a handful of Exodus-era designs that weaponized the metagame's own greed, rewarding you for the format trend toward greedy mana and doing nothing against the discipline of basics. As design it is more interesting than playable: a clean expression of "your mana base is a resource I can attack," built before nonbasic-land hate settled into the dedicated removal that does the job more directly.