Mystic Elevator

You gain access to a special demiplane known as the Mystic Elevator. This demiplane is a 1000 foot x1000 foot x1000 foot room and is attached to the current realm you are in (For example if you are participating in a quest in Tertia, then the Mystic Elevator is currently attached to Tertia). Inside the room is an infinite source of food, water, and oxygen. Any door opened to and from this demi-plane may be a size you choose up to 1000 feet x 1000 feet and functions like a door created by the usual Demiplane spell, except only you and creatures you designate may open and close them.

The Open Drawer - As a bonus action, you can open and close a door to the Mystic Elevator at any time. You may only open doors on the realm the Mystic Elevator is attached to. Moreover, a door can only be opened at a location you have knowledge of. 

Emergency Recall - You may also use your action to have yourself and a number of friendly willing creatures within 100 feet of you equal to your charisma modifier that you can sense appear in the Mystic Elevator at any time. This particular ability works in areas that forbid teleportation or planar travel.

Relocation Protocol - Once per day, you can use the Mystic Elevator to travel to a location or realm you know of regardless of distance. The Elevator will attach itself to the new realm (for example moving from Tertia to Technomira) and attempt to open a door at the specified location. If the Elevator cannot open a door at that location, this ability fails and its usage is not expended.