There are some advantages of having a higher Essence, but it's also an aspect of their inhumanness. It is arguably
the reason they can achieve Edge 8, and
definitely one reason. However, two powers True Drake PCs can purchase at chargen are Astral Armor 6 and Hardened Armor 6. I wanted it to be 8 so that Essence, Edge, and their natural powers were all tied together, but I was overruled (and rightly so in retrospect).
True drakes cannot accept any augmentations that cost Essence, nor can they be infected by any strain of HMHVV. True drakes can never possess the Resonance Attribute.
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This Quality is incompatible with Technomancer Qualities, Infected Qualities, Changeling or Metagenetic Qualities, Positive Augmentation Qualities (p. 20, Augmentation), Lucky, Latent Dracomorphosis, Latent Awakening, or Latent Technomancer.