After beating the 1st mage puzzle w/o a problem, I went on to the second one and got stuck. What is the soltution to this one(and, if you wouldn't w=mind, the other ones too)
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"it cannot be seen, cannot be felt, cannot be heard, cannot be smelt.
It lies behind stars and under hills, and empty holes it fills
It comes first and follows after, ends life, kills laughter"-Golum's riddle, the hobbit, J.R.R. Tolkien