Planar Affinity

Creatures hailing from or particularly attuned to a plane tend to have an affinity for their plane, allowing them to comfortably survive in that plane. Occasionally, extreme circumstances can cause a creature to gain affinity for a different plane than their native plane. For creatures that gain affinity, use the following templates

Shadow Affinity
A creature attuned to the shadow plane gains subtly darkened skin and eyes, with notably dark veins. The affinity is not immediately obvious unless the creature's black blood is spilled
 * Resistance to necrotic damage
 * Unlimited darkvision
 * Blindsight +30 ft
 * Weakness to radiant damage
 * Light sensitivity: disadvantage on attacks and sight-based perception and investigation checks while in bright light

Fey Affinity
Creatures attuned to the feywild has silver-grey eyes and slightly faded colors in their hair and fur.
 * Advantage on wisdom saves
 * Immunity to unique fey abilities
 * Proficiency in deception, persuasion, performance, or disguise
 * Iron sensitivity: disadvantage on all rolls involving directly touching iron
 * Weakness to cold iron

Light Affinity
Creatures attuned to the hostile plane of light gain thick, rough skin. Hair and fur thins and pales more rapidly with age.
 * Resistance to radiant damage
 * Advantage on constitution saves
 * DR +1
 * No darkvision
 * Tactile insensitivity: disadvantage on all checks requiring extreme fine motor skills