[Mysterious lights are a common theme in folklore around the world. They’re also already in D&D/Pathfinder as a creature, the will-o-wisp. So I decided to take a slightly different tack for the oni-bi, their Japanese equivalent.]
Oni-Bi
A flickering blue flame floats in midair, its radiance pulsing in a soothing fashion.
The greatest goal of the wicked incarnate spirits known as oni is to be
worshipped as a god by foolish mortals. Those mortals that fall for the
onis’ ploys do not rest easy in death—their souls are denied entry to
both Heaven and Hell, forcing them to wander the Material Plane forever.
All that remains of one of these doomed souls is a flickering flame,
capable of luring mortals to a doom as painful as that which afflicts
them.
An oni-bi’s touch sets flammable materials alight and drains the life
essence of the living—the victims of an oni-bi’s assault are little
more than charred and withered husks. An oni-bi’s radiance is capable of
soothing those that look upon it, rendering them unsuspecting of the
coming assault. Although many oni-bi lurk in the shadowed places of the
world of their own volition, they retain the subservience to the oni
that doomed them to undeath. Clever oni collect oni-bi to their sides,
utilizing them as expendable shock troops or lures to mesmerize their
own victims.
An oni-bi appears as a glowing ball no more than 1 foot in diameter.
Most oni-bi glow blue, but oni-bi under command of an oni shine with the
color of their master’s skin.
Hot cocoa haven 