Ancient Grudge

The math is what made this the artifact-hate spell of choice for years: two mana destroys the target now, then a single green mana brings it back from the graveyard to destroy a second one. A single card answering two artifacts is the rare removal that wins a war of attrition by itself, and that is precisely the problem artifact-heavy strategies present (one threat baited away, a second left standing). The color split is the deck-building cost that pays for it: full value needs both red and green, so the card sorts itself into Gruul and Jund shells rather than going anywhere a Mountain alone can reach. Flashback's exile clause caps the loop at two destroys, no more, which is plenty against a strategy built on a handful of key artifacts. Naturalize and Disenchant cover the same ground in one shot at one permanent and reach enchantments besides; this trades that flexibility for a second use, and against the right field the second destruction is worth far more than the broader wording. It remains the answer green-red decks reach for whenever they expect to face a swarm of cheap artifacts or a pair of equipment they cannot afford to leave on the board.