The 42nd Æther.
Astral Wardens are cosmic entities that watch over the boundaries between the physical world and the Astral Plane. Their role is to guard the passageways between dimensions, ensuring that no being crosses without purpose. if you astral project too far beyond the boundaries of your own world you'll likely be greeted by an Astral warden and if it deems your reason for traversing the cosmos isn't justified you'll be immediately forced back into your corporeal body, if it views you as a threat, It will trap you within the astral plane until your corporeal body dies. Many malevolent sorcerers from days long past have been subjected to this fate.
