Dark Sanctuary

You create a demiplane controlled by an extraplanar being. The interior of this demiplane is of your choosing, but must in some way reflect the nature of the being that controls it. If you are a warlock, then this being is your warlock patron. If you are any other class, the being is a deity you worship. This demiplane is accessed via a portal that you can summon and dismiss at will. This portal can be a physical object, or a visual or auditory effect. Other creatures can access the demiplane through this portal, but must succeed on a Wisdom saving throw to leave unless you allow them to. Creatures cannot exit the demiplane when the portal is not summoned. You can desummon the portal's manifestation on the material plane while you are inside the demiplane. You can resummon it in the last place it existed, or in a location that you have seen and can picture in your mind. You can also summon the portal within 60 feet of a creature that has been inside the demiplane. Once per round, as a free action, you can deal 2d6 psychic damage to any number of creatures within the demiplane. You can spend an action to compel a creature outside the demiplane to move towards and enter the demiplane unless they succeed on a Wisdom saving throw. If you are a Warlock, Cleric, Druid or similar class, you can sacrifice one creature inside the demiplane to your patron/god to regain 2d6 hit points or remove one effect on yourself. If a creature dies in this plane then it is sacrificed automatically.