Gorilla Shaman

Better known by its nickname, Mox Monkey, this is a creature whose 1/1 body is almost incidental to the repeatable artifact destruction stapled to it. The activated cost is the whole design: to destroy a noncreature artifact of mana value X, which means the cheaper the target, the cheaper the kill. A Mox of any kind, a Lotus Petal, a Black Lotus, anything that costs zero to cast: all fall to a single activation, repeatable as long as the Shaman survives and the mana flows. That pricing is the structural point. The cost scales to the target rather than sitting at a flat rate, so the card is brutal against cheap mana rocks and cost-zero artifacts while being almost useless against an expensive one. It punishes a specific category of artifact (the fast-mana accelerant) harder than anything else, which is why it has lived its whole life as a hatebear against artifact-mana strategies rather than as general-purpose removal. Repeatability is the property a one-shot answer like Shatter lacks: leave the Shaman in play with a single mana up and the artifact deck simply cannot keep a zero-cost rock on the table, because every replacement gets ground off the moment it lands. It is a narrow card by construction, sharpened to a single edge, and that edge has stayed relevant precisely because the artifacts it preys on have never gone away.