So, so many. Top 5.

“I am where dead children go.” -Rin Chupeco, The Girl from the Well. “Prince Raoden of Arelon awoke early that morning, completely unaware that he had been damned for all eternity.” -Brandon Sanderson, Elantris. “No live organism can continue for long to exist sanely under conditions of absolute reality; even larks and katydids are supposed, by some, to dream.” -Shirley Jackson, The Haunting of Hill House. “This is long work, a finding spell for roots destined to twine.” - Amber McBride, Me(Moth). “Information requested: the Spiritual Origin test of Sacred Valley.” -Will Wight, Unsouled.

The opening line is not necessarily what gets my attention, but it is a jewel in the piece, and the wry cut, or the flashy one, stays with me.