Gate to Phyrexia

The artifact-hate answer of its era, built around a cost structure that looks bizarre by modern standards and reads as a relic of how the early game thought about repeatable removal. The activation is locked to your own upkeep and once per turn, which means the card is not a removal spell so much as a slow grinding lock: one artifact per turn cycle, paid for in creatures, with the opponent getting a full turn to deploy or use whatever you are about to destroy. Against the artifact-heavy decks of its moment (the Juggernauts, the Mishra's Factories, the various Workshop engines), that grind was enough; against anything faster, the upkeep restriction made the card a parity piece at best. The design logic is visible in the timing clause: Wizards was clearly nervous about a two-mana enchantment that destroyed an artifact every turn, and the upkeep-only, once-per-turn fence was the discipline that made the rate printable. Later artifact answers abandoned the structure entirely, moving to one-shot spells (Shatter, Naturalize) or to permanents that taxed rather than destroyed. The card survives now mostly as a flavor artifact of the Brothers' War block and as a curiosity in the lineage of black artifact removal, a color pairing the game has never fully committed to and which this card briefly, awkwardly, made real.