From hard stax pieces like Elesh Norn, Mother of Machines, Drannith Magistrate, and Archon of Emeria to softer disruption in Thalia, Guardian of Thraben or Ranger-Captain of Eos, white disrupts and stops your opponents better than any color except maybe blue and its countermagic
It's run in 3095 decks, likely Aristocrats and Sacrifice brews looking for bodies to sacrifice for their triggers
When that condition is met, this becomes a piece of your critical mass of early plays
And I dont see wanting a preponderance of auras or combat tricks in a self-mill deck
It thrives in builds that can generate and sacrifice artifacts efficiently, turning them into potent removal, direct damage, or lifegain
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