Demiplane

Level 17 Bastion Facility

• Prerequisite: Ability to use an Arcane Focus as a Spellcasting Focus
• Space: Vast
• Hirelings: 0
• Order: Empower (1d10 BP)

A shadowy door appears on a flat, solid surface in one of the other facilities in your Bastion. You choose the location. If you are in your Bastion during a Bastion turn, you can relocate this door to another facility in your Bastion. The door is large enough to allow Medium creatures to pass through it unhindered, and only you and your Bastion’s hirelings can open it.
The door leads to a Demiplane that takes the form of a room made of otherworldly materials as resilient as stone. The Demiplane exists in an extradimensional space and therefore isn’t attached physically to other locations in your Bastion. Neither the Demiplane nor its door can be dispelled.
When you issue the Empower order to this facility, magical runes appear on the Demiplane’s walls, floor, and ceiling and last for 7 days. Until the runes disappear, you gain Temporary Hit Points equal to five times your level after spending an entire Long Rest in the Demiplane.
The Demiplane also imparts the following benefits:

• Fabrication. While in the Demiplane, you can use a Magic action to magically create a nonmagical object of your choice from nothing, causing it to appear in an unoccupied space within the Demiplane. The object can be no bigger than a 5-foot cube in any dimension and must be made of wood, stone, clay, porcelain, glass, paper, nonprecious crystal, or nonprecious metal. You must finish a Long Rest before you can perform this action again.
• Scry-Proof. The Demiplane and its contents can’t be scried upon using Crystal Balls, Divination spells, or similar magic.