Winnow

The conditional is the whole design: the kill only fires when a second permanent already shares the target's name. That gates the removal hard. Point it at a singleton legend, a unique enchantment, or any one-of, and the destroy clause does nothing; the spell needs two permanents with the same name to land its real work. Where it pays off is against board states stacked with repeats: token swarms, doubled-up workhorse commons, a copied permanent deployed twice. In those spots it trades up cleanly and still replaces itself. Strip the condition away and the floor is a two-mana white draw spell with no other text, which is the cost of the upside. The cantrip rider softens the worst case: when no duplicate exists, you destroy nothing and simply draw a card. But the rider does not make the spell uncastable-proof, because it still demands a legal target. With no nonland permanents on the battlefield at all, there is nothing to point it at, and it sits dead in hand until something lands. This is removal built to punish redundancy specifically, an answer keyed to the opposing board's repeats rather than to any unconditional threat. The reward for finding the right window is instant-speed removal with a free card attached; the price is a kill clause that lapses the moment your opponent's board is all unique names.