Who said "I've seen the end of all things, and it's not pretty."?

This quote is attributed to Grim.

I've seen the end of all things, and it's not pretty. - Grim

"I've seen the end of all things, and it's not pretty."

Grim Death

"I'm a creature of pure evil, and I find your optimism... disturbing."

"Foolish boy, your mortal comprehension cannot fathom my dark intentions."

"Death is my business, and business is good."

"Your pitiful existence amuses me."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."