Answer:
Describes universities like Harvard and can be poisonous.
Useful tool for who in darkness dwell. Within you, corrupting like a deadly spell.
It's like food but water kills it. What is it?
What is it that makes tears without sorrow and takes its journey to heaven?
I do not breathe, but I run and jump. I do not eat, but I swim and stretch. I do not drink, but I sleep and stand. I do not think, but I grow and play. I do not see, but you see me everyday.
I am your mother's brother's only brother in law. Who am I?