Corpse Candle

The ghostly hand carries a lit candle that sheds dim light in
a 5-foot radius. You can move the hand at the beginning of
your turn as you desire-forward or back, up or down,
straight or around corners-up to 50 feet per round.
Directing the candle is a free action. The hand and candle
are incorporeal and can pass through objects. A corpse
candle illuminates hidden, ethereal, and invisible beings and
items, all of which become faintly visible as wispy outlines.
Ethereal creatures remain unreachable from the Material
Plane, but illuminated incorporeal and invisible creatures do
not benefit from concealment, and so attacks against them
suffer no disadvantage.