The Editing Ink Charm is a spell used to change words that have been written in ink. Upon casting the charm, the enchanted ink twists and writhes into the form of the new words. The countercharm, called an Unediting Spell or Editing Ink Reversal Charm, undoes changes made with the Editing Ink Charm.

Alexandra Quick uses the charm to alter words in an apology letter written to Thomas Bagby, and Anna Chu uses the counterspell to undo Quick's changes. Quick later uses the Reversal Charm on the Registrar's Scroll to discover that her birth name, according to the Territorial Census Office, was "Alexandra Thorn."