Death and Taxes (Yorion) brings heavy disruption in Thoughtseize, Wasteland, and Karakas (which can bounce our legendary reanimation targets like Griselbrand or Atraxa, since both are legendary creatures — Koma is legendary too, and Archon of Cruelty is the notable exception since it isn't legendary). The extra Collective Brutality's discard mode helps strip their Swords to Plowshares or Solitude before we commit a reanimation spell, and its -2/-2 mode can clean up small creatures like Phelia or Stoneforge Mystic. Abrade answers a Stoneforge Mystic or a resolved equipment threat like Meteor Sword. Koma and Raph & Mikey are cut since Karakas can simply bounce Koma for tempo loss, and both are too slow against a deck with proactive disruption and efficient removal like Swords to Plowshares and Skyclave Apparition.