Capashen Unicorn

Disenchant stapled to a body, with the body as the price rather than a bonus. Where a Disenchant spends a card to answer one artifact or enchantment, this Unicorn sits on the battlefield as a 1/2 until the threat you are waiting for actually shows up, then converts itself into the removal. That delay is the whole bargain: you pay the body, the tap, and two more mana to fire it, so the answer is slower and clunkier than a spell, but it is an answer that draws no card to find and threatens to trade in combat in the meantime. The sacrifice clause is what makes the rate fair: this is a one-shot, and once it goes off the creature is gone, so it never becomes a repeatable enchantment-lock the way a body with an untapped ability would. As a piece of color-pie design it reflects white's long habit of folding utility into small creatures rather than dedicated spells, the same instinct that later produced any number of toolbox bears with an artifact-or-enchantment trigger baked in. The cost in tempo (you cannot deploy the threat and answer it on the same turn) is exactly why it never displaced the instant-speed version where speed mattered.