The Gateway Chronicles is a series pertaining to two worlds and the attempts of the prophesied Six to halt the entry of the Big Bad from another world.
This work contains examples of the following tropes:
- Extradimensional Shortcut: Sam, Tellius, and Lewis traveling from the cave gateway to Fobos by going through Tselloch's world could be considered this.
- Big Bad: Tselloch, naturally. His name even means "Great Shadow," or... Big Bad.
- Hell Gate: Every portal to Tselloch's world, to the point that anyone in the vicinity slowly goes insane.
- Teleport Interdiction: One of Tselloch's gateways is rendered (mostly) harmless by stuffing several boulders into the cave it's located in.