Lol, take it from a dude whose main username is White Shadow, and loves riddles
The answer is Shadow
It only appears where there is light, but if light has direct contact with it, such as a flashlight beam, it'll fade.
I think you are talking about ice-t
Called uli !
lmk if this helped :)
There are four steps;
look at the obvious
analyze the artwork
decide on an interpretation
make a judgment