But its aura had been masked, disguised by the meta-humans who had taken it from the chamber in Dunkelzahn's lair. They had dulled its astral resonance. Weakened Lethe's ability to follow its trail through astral space. But his sense of the Dragon Heart was extremely keen. The tracking had been more time-consuming and difficult, but Lethe still smelled the tendrils of mana that the Dragon Heart left behind. The delicate eddies and currents it created in astral space.