Last Guardian — David Gemmell

While the earth quaked, a deadly power burst forth from ancient Atlantis. For the gate of time had been torn open, freeing a cataclysmic evil.

Only the last guardian, Jon Shannow, the legendary pistoleer, could shut the deadly portal. But to accomplish this he would have to find the shining Sword of God, said to be floating among the clouds in the perilous lands beyond the wall, where beasts walk like men and worship a dark goddess. As Shannow embarked on his impossible quest, demons gathered in wait.

And--somewhere--a golden-haired woman was dreaming of blood ...