Realms of Gods and Mortals

What is the farthest explored point on the known world?” Elspeth asked.
“In the east, beyond the leonin lands, there’s another forest,” Daxos told her. “Larger even than the Nessian Forest. No one knows how far it goes.”
“What’s to the west beyond the sea?” Elspeth asked.
“The world ends at the waterfall where Kruphix’s Tree grows,” he explained. “The sea falls off the edge and into the void below.”
“My home was beyond your infinite forest,” she said.

-Jenna Helland, Godsend

The world of Theros, as its inhabitants understand, includes three realms: The Mortal Realm, the Divine Realm of Nyx, the Underworld, and The Faewild of Theros. They are four distinct planes of existence, tucked into their own pocket of the multiverse and shielded from the rest of the cosmos by the power of the gods.

Well, mostly, as the Faewild does not fall under the juristiction of the Pantheon of Theros - though they can enter it if they so choose, like Nylea visiting the Queen of the Fae every Midsommar - and is somewhat connected to all corners of the multiverse with their own connection to a part of the Faewild. But it is still protected and using it to travel to other worlds is neigh impossible because of the overwatch of the High Fae.

This chapter discusses each of these realms in turn, with a focus on the mortal realm where the schemed of the gods intersect with mortal lives.