The old man nodded: "Indeed, there are drawbacks to increasing one's strength too quickly."
"For a normal martial artist, it takes at least five years to go from the Mortal Level to the Spirit Level, and twelve years to go from the Spirit Level to the Xuan-level!"
"Fusing bloodlines too quickly means the time each bloodline has to merge with your body is too short. As a result, though the bloodlines may seem to have merged with your body, they have not completely fused."
"At the Mortal and Spirit Levels, the main risk of bloodline fusion lies in combining four different bloodlines. At this point, as long as you fuse only one Ancient Demon Bloodline, you shouldn't run into any problems."
"However, once you reach the Xuan-level, the drawbacks of rapid strength increase will appear. The risk of bloodline fusion not only emerges when combining four bloodlines but also when fusing a single bloodline, which may lead to bloodline conflict."