Stars awash in a sheen of light
It calls out loud in vile delight.
Listeners endure in fright.
Vicious brute that reigns at night,
Evil whelped of heinous bite,
Renewed by wax, it regains might.
A leading way to slay the beast,
Get the hidden weapon thus released.

What is this describing?
Hint: The first letter of each line has a clue