Cameron's Moving Castle

You create a circle of chalk on a flat surface of ground that is about 30 feet by 30 feet, and inscribe the area with arcane runes, sigils and marks for 10 minutes. 

You manifest a 30x30 feet hut with legs magically attached to it. On the outside, the hut can take an appropriate appearance you choose (with DM limitations, if applicable), but will always be 30x30 feet inside the hut. Four creatures of Medium size or smaller can fit inside the hut with you. The spell fails if its area includes a larger creature or more than five total creatures. Creatures and objects that you designate within the area when you cast this spell can move through the castle freely. All other creatures and objects are barred from passing through it and its walls. Spells and other magical effects can't extend through the hut or be cast through it. In the inside, the atmosphere is dry and warm, no matter the temperature outside. The windows and doors of the hut are protected by the spell, Alarm.

The hut has the following items, which disappear if you remove them from the hut:

• A table with 4 chairs
• A magical fireplace, housing a Continual Flame 
• A witch's cauldron, normally used to make potions.
• A desk with ink pens, scrolls, paper and ink.
• 4 beds with bedding

As an action, you can make the hut move up to 120 feet in any direction, however, it can't move if there's a steep elevation change of 30 feet or more - up to DM interpretation. 

Inspired by the wizard Howl Jenkins-Pendragon, Cameron the Clairvoyant journeyed to the world of Strangia, to help rid the hatter girl, Sophie, from her curse from the Witch of the Waste. While there, he encountered the Wizard Howl, who was notorious for stealing the hearts of pretty girls, and for his passive tendencies. Cameron witnessed Howl conjure a new Teleportation Circle via a Dimensional Door into his own moving castle, and taught Cameron the secrets of dimensional transportation magic. With those secrets, a new ritual spell was born, allowing small parties of 5 or fewer to travel over vast distances in comfort.