Answer:
Plant whose name sounds like a dish full of dairy spread.
I weaken all men for hours each day. I show you strange visions while you are away. I take you by night, by day take you back. None suffer to have me, but do from my lack.
As destructive as life, As healing as death; An institutioner of strife, Just as prone to bless. It is all that is good, Yet with an evil trend; As it was the beginning of things, It can also be the end.
My first is a body of water. My second is me. My third came before. My fourth before all three. My fifth sounds like my first. My sixth is in a lake. Put all six together to make an animal that will keep you awake.
I fly, yet I have no wings. I cry, yet I have no eyes. Darkness follows me. Lower light I never see.
I have two eyes in the front and a lot of eyes on my tail