Many revised cards exist with corners that were trimmed by their owners to match their Alpha or Beta cards, so only purchase Alpha Cut Revised if you know how to tell the difference, or trust your source
A set is a full release of cards that usually centres around a specific theme, region, or gameplay mechanic, like the Scarlet & Violet or Sword & Shield booster bundles
Against these two cards and the odd sorcery referencing some sort of windy calamity, the other colors have actual themes: Black has vampirism, Blue has milling, and Red has burn
But a few collectors do specifically chase the "1999-2000" eighth print run, which is identifiable by the dual-year copyright at the bottom of the card
Killer Cosplay's triggered ability won't trigger