Courier Shift

This is a modified version of the Plane Shift spell. It can only be used for travel between the Free City and one of the material planes. When cast at a second level, it allows the caster to shift between the Free City and any material plane to which they are attuned, or to which they have an appropriate attunement material. Casting this spell at higher levels allows the caster to bring more willing creatures or more material with them.
Material becomes attuned to the demi-plane after approximately 50 years existing there.

Courier Shift

2-level Conjuration

Casting Time: 1 action

Range/Area: touch

Materials: A piece of metal, worth at least 200 gp that is attuned to the target plane; a corresponding piece of metal or glass for the Demi-plane

Duration: Instantaneous

At 2nd level: You may transport yourself and as much material as you are capable of carrying.
3nd Level and higher: For every spell level above first, you may bring one additional willing creature of medium size, two willing creatures of small size, or four willing creatures of tiny size, and an additional 200lbs of inanimate material.
4rd Level and Higher: Starting at 3rd level, you may transport one willing creature of large size, two willing creatures of Medium size (etc.)
7th Level: You may use this spell at 7th to make a touch spell attack against an unwilling creature They must succeed on a charisma saving throw or sent to a plane of your choice

Available for: Cleric, Sorcerer, Warlock, Wizard, Druid

Material Components

A piece of metal or bone from the Free City that has existed on the plane long enough to be attuned to it (~ 75 years). If the destination plane is not your plane of origin, you also require a material component from that plane, or a willing creature from that plane.