Who said "I've achieved immortality through sheer malice."?

This quote is attributed to Mr. Burns.

I've achieved immortality through sheer malice. - Mr. Burns

"I've achieved immortality through sheer malice."

Mr. Burns Death

"Release the hounds!"

"I'm trying to be a better man, but it's exhausting."

"Money can be exchanged for goods and services."

"Smithers, release the robotic Richard Simmons!"

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."