Answer:
I can be quick and then I'm deadly, I am a rock, shell and bone medley. If I was made into a man, I'd make people dream, I gather in my millions By ocean, sea and stream.
When I live I cry, If you don't kill me I'll die.
A doctor might remove one from the neck of a Dracula victim.
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
Vikings use this for warmth.
Be sure to shout for its answers are weak, but there is no language it cannot speak.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?