Answer:
Useful tool for who in darkness dwell. Within you, corrupting like a deadly spell.
A reaction to being spooked that takes its name from waterfowl
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
Twigs and spheres and poles and plates. Join and bind to reason make.
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
What is so fragile that saying its name breaks it?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?