But it
must have been made of 'shade' 'cos Tolkien says it was
like shade
Quote:
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It looked like the black shade of a horse led by a smaller black shadow
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The 'shadow' in the case of the Balrog
is an
unnatural 'substance' - it is 'cast' by the 'Dark Fire' of the Balrog - which isn't ordinary fire.
Its appearance may be manipulable to some extent by the Balrog, but it is 'Shadow'.