"The Book of the Future complained, "My soul has not recovered, and the Soul Devouring Demon is very powerful. Even with the use of the Master's Spiritual Energy, it consumes a lot from me."
"Shut up, just use it."
The Book of the Future hummed discontentedly and flipped through its pages quickly.
Rod felt his Spiritual Energy being rapidly drained.
A moment later, he had the answer the Book of Knowledge wanted.
"I haven't seen any malignant futures; killing them won't further intensify the Source feedback. The future holds Divinity, and there's Nightmare Fuel, hmm, a very small chance to obtain a Nightmare Gem."
The Book of Knowledge shouted, "Exactly, I knew it! Killing the symbiotic creatures of the Black Fog would result in Nightmare Fuel. Although this part of my memory is lost, I can deduce it. It was indeed the right choice to come to the battlefield of Starry Sky City."
