Urgent Necropsy

The four-permanent-types clause makes this look like a catch-all, and it very nearly is: one instant that can take an artifact, a creature, an enchantment, and a planeswalker in a single cast, each optional so it never dead-draws against a lean board. What keeps a Vindicate-times-four from being obviously broken is the evidence tax bolted onto the front. The additional cost scales with exactly what you point at, so the more value you strip off the board, the more graveyard fuel you have to spend before the spell resolves. Blowing up a mana rock and a token costs almost nothing; sweeping a heavy planeswalker, a fatty, and a signature enchantment can demand collecting evidence well into the twenties, which turns your own graveyard into a resource pool you have to have banked in advance. That is the real design idea: a removal spell whose ceiling is gated not by mana but by how much you have already died with. It rewards decks that fill a graveyard as a byproduct and punishes ones that keep it empty, folding a self-mill payoff into what would otherwise be a pure control effect. Because every target is optional, the floor bends to the board: point it at a single threat and you have paid four mana plus an evidence tax for one-for-one removal, and the multi-type blowout that justifies the cost is only ever available to the decks built to feed it.