Belying Perspective

A form of seiðr magic that dances the line between transmutation and illusion. When you cast this spell you may designate an area 10,000 sq ft shaped as you desire, protecting it from being perceived. The spell does not fail if the area includes an area already hidden by this spell, however for every overlapping instance of this spell there is a cumulative 10% chance a doorway to a random plane of existence as determined by the DM may appear. You may designate any number of objects or structures within the space at the time of casting and when the spell is cast, anything you have designated becomes hidden from view; not invisible, but shifted along an impossible spectrum. The protected space can only be seen from between the two totems used as an entryway for this spell, and can only be interacted with when a creatures crosses through the threshold of these two totems. Within the area but outside of the hidden space a creature with truesight can determine that something is being hidden, but gains no insight as to what or where it might be.

Any structure, object, or creature hidden away by this spell can not be interacted with outside of the space, unless a creature first crosses the threshold. When a creature enters this space by way the threshold, they are considered to be on another plane while within the space. When anything hidden by this spell leaves the confines of the area, it ceases to be hidden, returning to normal space. While within the hidden space, you can still see and hear outside of the space as normal, however anything that crosses the space without crossing the threshold appears illusory and incorporeal, and they can neither see, hear, nor touch anything that is currently within the hidden space.

If several instances of this spell overlap, a creature can only perceive and interact with the instance of the threshold it has crossed. The totems used in the casting of this spell can be moved at any time along the perimeter of the spell, but must never touch each other, or the spell is immediately dispelled.

If at any point the totems used in the casting of this spell are removed from the area of the spell or destroyed, the hidden space immediately returns to normal space. If this causes any objects, structures or creatures to occupy the same space, each object, structure or creature overlapping in this way takes 10d10 force damage that can not be negated in any way and all are forced to the nearest unoccupied space.