Shadowfall Planar traits

The Shadow Plane has the following traits:

Unlike the Material Plane, the Shadow Plane is quite different. The following is a summary of these differences:

Magically Morphic: Parts of the Shadow Plane continually flow onto other planes. As a result, creating a precise map of the plane is next to impossible, despite the presence of landmarks. In addition, certain spells, such as shadow conjuration and shadow evocation, modify the base material of the Shadow Plane. The utility and power of these spells within the Shadow Plane make them particularly useful for explorers and natives alike.
Mildly Neutral-Aligned
Enhanced Magic: Spells with the shadow descriptor are enhanced on the Shadow Plane. Furthermore, specific spells become more powerful on the Shadow Plane. Shadow conjuration and shadow evocation spells are 30% as powerful as the conjurations and evocations they mimic (as opposed to 20%). Greater shadow conjuration and greater shadow evocation are 70% as powerful (not 60%), and a shades spell conjures at 90% of the power of the original (not 80%). Despite the dark nature of the Shadow Plane, spells that produce, use, or manipulate darkness are unaffected by the plane.
Impeded Magic: Spells with the light descriptor or that use or generate light or fire are impeded on the Shadow Plane. Spells that produce light are less effective in general, because all light sources have their ranges halved on the Shadow Plane.
Natural Light Sources: During the day, the dim sun gives off light that is similarly bright as a full moon. At night, the blood moon illuminates the areas as bright as a cloudy, moonless night. For more information on light sources, see Chapter 7 of the Pathfinder Core Rulebook.
Mundane and Magical Light Sources: All light sources have their ranges cut in half on the Plane of Shadows.
Shifting Landscape: The Plane of Shadows constantly absorbs parts of other planes that are forgotten. As such, Shadowsfall shifts constantly, making a precise map impossible.
Spells with the Fire or Light Descriptor: Spells with either the fire or light descriptor require a concentration check (DC 20 + the level of the spell) to successfully cast. A failed check means the spell is lost. A successful check means the spell functions normally.
Spells with the Shadow Descriptor: Spells with the shadow descriptor are treated as if cast at 2 caster levels higher. Additionally, spells with the shadow descriptor are treated as if 10% more real. For example, disbelieved shadow evocation spells are 30% as strong as normal instead of 20%.

The eerie and deadly Shadow Plane is a grim, colorless “duplicate” of the Material Plane. It overlaps with the Material Plane but is smaller in size, and is in many ways a warped and mocking “reflection” of the Material Plane, one infused with negative energy (see Inner Planes) and serving as home for strange monsters like undead shadows and worse. Powerful spellcasters utilize the Shadow Plane to swiftly travel immense distances on the Material Plane with shadow walk, or draw upon the mutable essence of the Shadow Plane to create quasi-real effects and creatures with spells like shadow evocation or shades.

Shadowfall Planar traits

Carrion Crown: Kyle's ktle1985