Kami of Ancient Law

The clever trick here is that the body and the answer come bundled into a single card, but you only spend one of them at a time. As a 2/2 for two it blocks, attacks, and trades like any modest white creature, sitting in play doing nothing alarming. The sacrifice clause is the latent half: the moment an enchantment you can't abide hits the table, the Spirit cashes itself in to destroy it. That structure makes it a flexible answer rather than a dead card, because the worst case is still a real creature. The design lineage runs through every creature that doubles as a tucked-away enchantment removal spell, white's answer to the problem that dedicated naturalize effects rot in your hand when the opponent never plays the target. Folding the removal onto a Spirit body solves that: nothing is wasted. The cost is timing. The ability triggers nothing on its own; you choose when to convert the creature into a destroy effect, and once you do, the board presence is gone. It rewards holding the option open until an enchantment actually demands an answer, then collapsing the two roles into one with a single activation.