Mono-Blue Terror relies entirely on cheap cantrips and counterspells to enable Tolarian Terror and Cryptic Serpent, so racing them before their graveyard fills up is key, and none of our artifact hate (Dust to Dust, Revoke Existence) or color hosers (Pyroblast, Red Elemental Blast) have legal targets since they play no artifacts and no red spells. Hinterland Sanctifier adds extra life gain as we flood the board, buying time against Delver of Secrets chip damage and the eventual Serpent/Terror finisher. We trim a Thraben Charm since its enchantment and graveyard-exile modes are irrelevant and its damage mode is often eaten by Counterspell or Dispel, and cut a Javelineers since a single damage ping rarely matters against their big late threats. Keep the aggressive curve intact to punish their tempo-negative cantrips.