Who is Metatron?
Metatron is this really cool Archangel, and he's said to be the Scribe of God (so he's pretty powerful, you see). He is a teacher of Esoteric knowledge and uses Sacred Geometry to clear energies and heal. He used to be a human, who lived such an extraordinary life that he ascended to archangeldom. That's how awesome he is.
You can call upon Metatron and his healing cube to clear your energies if you're feeling overwhelmed or depressed. Imagine his cube rolling down from the top of your head all the way down your spine, clearing and illuminating each chakra.
I heard somewhere that he's the one helping highly-sensitive kids and young people who, because of their spiritual gifts, are misunderstood and awkward in social situation... He is dedicated to give us all greater understanding of the esoteric wisdom that can guide us in this life.