Saltblast

The single word "nonwhite" is the whole design, and it does two jobs at once. First, it gives white the open-ended destruction the color usually rations out across narrow answers: this points at a land, a planeswalker, or a creature with equal ease, where white normally needs a different card for each. Second, the carve-out builds an asymmetry that rewards committing to white rather than splashing it. Against a board full of white permanents the spell rots in hand; against anyone else it cleans up threats white's own toolkit handles awkwardly or not at all. The cost keeps the trade fair from the other side. At five mana and sorcery speed this is the slow, guaranteed answer rather than a tempo play, and because it destroys rather than exiles, it lags behind white's exile-based removal against indestructible permanents and recursion: you give up timing flexibility and the finality of exile in exchange for the freedom to name any nonwhite permanent type. The flavor and the mechanic are the same gesture. White's destructive reach has always been a matter of design philosophy more than capability, and here that philosophy is drawn as a literal color line through the spell, granting white everything it normally forgoes the moment its own permanents are exempted from the blast.