Dagon

Whever you cast a blue spell Surveil 1 (Look
at the top card of your library. You may put
it into your graveyard.)
"The end is near. I hear a noise at the door, as of some immense slippery body lumbering against it.
It shall not find me. God, that hand!"- H.P.
Lovecraft, Dagon and the novels of Terror
(1933)