You create two doorways and the backroad that stretches between them. You can shape the doorways as desired to fit particular entry or exit points; if left unspecified, they are rectangular fields of energy twice as tall and wide as the caster. You cannot create a doorway to a remote location if you have not physically visited it at some point in the past. The two points linked by the backroad must be on the same plane of existence.
While it appears to others that you only sit in place for an extremely long time when casting this spell, you travel mentally through the first doorway and witness the summoning of the doorway guardians that will protect the backroad and act as the sentry over both entry points. The doorway guardian always maintains a Helpful attitude toward you as the creator of the backroad to which they are charged. If the doorway guardian is ever slain by those travelling its backroad, the magical backlash from its destruction permanently open the doorways on both ends, making it easily passable by any who find the openings.
Your mental form also scatters the sapphire physical components at the opposite end of the backroad to establish the end point and exit doorway. The initial and concluding parts of this spell's casting require the preparation and anchoring of the doorways to its entry and exit points.
Material component: Powdered sapphire worth at least 1,000 shillings.