'What is a shadow to you?'
The scholar asked his apprentice, a young elf in a vast library, one that reached as high as the skies, countless books lay in its old halls, millennia of research, poetry, fiction, all kinds of knowledge gathered by the brave and mighty lay in these halls.
'... A shadow is something cast when a physical object obstructs the path of light, Sir.'
'Oh for the love of the World Tree, We live in a universe full of magic, aura and all kinds of unique things and that's what you come up with? You're never going to get far in life, Aster!'
'My apologies, Master.'
'Let me ask you again, what is a shadow?'
The young elf stopped for a moment, thinking over his answer multiple times, taking knowledge from everything he had acquired.