Like the other Terror-based blue decks, Dimir Terror relies on self-mill from Thought Scour and Mental Note (and delve on Gurmag Angler) to cheat out Tolarian Terror early, so Faerie Macabre's graveyard exile directly denies the cost reduction and can strand a Terror in hand. Duress strips Counterspell or Snuff Out before you tap out for your own threats. Tithing Blade, Campfire, and Accursed Marauder are too passive to matter against a tempo-oriented blue deck, so they're cut. Keep Cast Down and Unmake as your clean answers to a resolved Tolarian Terror, since it dodges most damage-based removal once it's big.