The Plane of Dreams is a dimension that exists on the boundaries of many others—not just the Material Plane but also Limbo, the Plane of Shadow, and the Astral Plane as well. While this interactivity is what sustains Alucinar, there are areas where two or more dimensions interact and interfere with magic, change the nature of gravity, or even alter the flow of time.
Proximity (and thus accessibility) to so many different dimensions has made the Dreaming Island a locale sought after by arcane theorists and magical researchers since its discovery. Reaching the Plane of Dreams is not as simple as a slumber, however; only certain creatures (those native to the realm) are able to leave it, and otherwise it is accessible only through very specific locales or the use of rare substances found only in Aventyr.
Though they can be dangerous and unpredictable, locating a dimensional overlap on the Plane of Dreams is a simple endeavor for anyone adept with arcane or divine energies. The convergence of planes is extremely easy to see; a detect magic spell and Perception check (DC 1 + 1 per 1,000 ft. from the overlap) allows a creature to read the ebb and flow of power in Alucinar.
These areas of Alucinar have terrain or shape, gradually turning into just a flat plane spotted with orbs of normal darkness, supernatural darkness, and nothingness. The shadow overlap fluctuates in brightness, leading inexperienced travelers to paths that seem to illuminate but really only serve to cement the terror of losing one’s senses. Knowledgeable explorers know that within a shadow overlap, the safest path to travel is in supernatural darkness.
- Within a shadow overlap all light brighter than normal light becomes normal darkness. Dim light and darkness becomes supernaturally dark. If an area already has supernatural darkness it becomes nothingness; all visual-based senses cease to function in that area, incurring a 50% miss chance to attacks and a 75% chance to move in a random direction.
- Light-based spells do not function in a shadow overlap and fire-based effects only provide a dim gray glow, easily visible to creatures within 60 feet. Fire-based damage is reduced by 10 in the shadow overlap.
- There is a 30% chance each hour that a shadow overlap fluctuates in brightness. When fluctuating the brightness of an area raises by one step up to normal darkness, if already at normal darkness it fades and all visual-based senses cease to function in the area. If a creature is in an area of normal darkness when this happens, that creature takes 4d6 negative energy damage (no save).
- Any type of aberration or evil outsider can appear in a shadow overlap.
[Submitted by Tim Snow!]