Cthulhu.
A Demon of mythical proportions.
The Matron of the Seas. The Terror of the Deep. The Nightmare of all mankind.
Various names have been given to Cthulhu over the years. Some of them had been forgotten to time as the monster's existence spanned generations. An undying creature that never once showed signs of weakness. A Demon that never died no matter what magic was thrown at it.
Just staring into its eyes would drive one mad. No mortal mind could withstand the pressure of the apex being that no one in history could defeat.
Even in the prime of his life, Dracula was unable to touch the level of the Demon Lords. There were multiple instances when a Demon Lord invaded the planet, only to wreak endless amounts of havoc before inexplicably returning. And during those years of mayhem, there was nothing the world's mightiest beings could do but pray for their survival.