C437 The Brotherhood Was Deep

"That's right, this is indeed the legendary Jade Marrow that's rarely seen! Although it's not a supreme grade, if you use it to cultivate inner force mantras, you'll definitely be able to achieve twice the result with half the effort." Xiao Yu said with a smile.

After all, Sun Dong had eaten and seen it more than ten years ago. He quickly recovered from his shock.

"From what you said