The Nexus was unique among perpendicularities, as it led to not one place in the Physical Realm, but three. One of which was hidden, shadowed: the planet of Yolen. For millennia, the dragons had kept the secret that it was the source of nearly all life in the cosmere and the origin of the Shards, though that news had been revealed quite dramatically a few decades back. Still, travel to it was strictly regulated.
