Artifact Ward
Three clauses, one enemy: this Aura was built to slip a single attacker entirely outside the reach of an artifact deck. Each line answers a different vector the metal could bring against it. The enchanted creature cannot be chump-blocked by Tetravus tokens or a Triskelion body; it cannot be shot down by Triskelion's own pings or a Cursed Scroll's incidental damage; it cannot be targeted by the abilities that defined the era's artifact sources. This was a new request for white. The set that introduced artifacts as a deck archetype rather than a card type forced the color to do something it had not been asked to do before: protect a creature from an entire material category, surgically, for one mana. The narrow scope is the design, not a flaw in it. The matchup it answers either sits across the table or does not, with no middle ground, which is exactly why the rate is so aggressive. Aura-based hate has fallen out of favor since (the two-for-one when the host dies is brutal, and modern hosers tend to be creatures or enchantments that hit the whole board), but the template it established (cheap, color-pie-appropriate, single-category lockout) is the ancestor of every Stony Silence and Collector Ouphe that followed.
