Liliana - Mana-Drawing

  A summoning such as the one she’d invoked … Her essence must be dry as parchment. The swampy earth beneath Avaric was reasonably mana-rich and particularly suited to Liliana’s style of magic—it was one of the reasons they’d moved there after falling out with Jace—but they were traveling, slowly but surely, away from it as they headed toward Favarial. Her recovery would take time.

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Agents of Artifice, Chapter 4