Doorway

You create a magical link between a door you touch, and a door you have seen within the last 24 hours. The doors are enchanted so, that when opened up next time within the next ten minutes, they lead directly to each other as if they were in adjacent rooms. Any creature using the doors is able to walk through them. When either of the doors closes after this, the doors return to normal. In order for the spell to work, both of the doors must actually contain a doorframe and an useable door. If either one of the doorways is destroyed, the spell ends.

If two doors are the target of this spell daily for the course of a year, the enchantment becomes permanent.

The spell level determines the distance the two doors can have:

At 2nd Level. The doors distance can be at most 20ft.

At 3rd Level.  The doors distance can be at most 40ft.

At 4th Level. The doors distance can be at most 100ft.

At 5th Level. The doors distance can be at most 500ft.

At 6th Level. The doors distance can be at most 1 mile.

At 7th Level. The doors distance can be at most 5 miles.

At 8th Level. The doors distance can be at most 25 miles.

At 9th Level. The doors distance can be at most 250 miles.