Answer:
Long and slinky like a trout, never sings till it's guts come out.
Useful tool for who in darkness dwell. Within you, corrupting like a deadly spell.
Twigs and spheres and poles and plates. Join and bind to reason make.
What turns everything around but does not move?
Voiceless it cries, wingless flutters, toothless bites, mouthless mutters.
The warmer I am the fresher I am.