Although the soul mark of the bone dragon has been planted, there is still a long way to go before fully controlling the bone dragon.
The resilience of such a powerful undead creature's soul has reached a very strong level, and cannot be easily controlled by just a soul mark.
It requires an in-depth integration of personal spiritual power with its body, even to the extent of infusing one's spiritual power into every inch of the bone dragon's bones and every element.
The main reason is actually the strength gap between Lynch and the bone dragon.
This is a bone dragon transformed from a real giant dragon, which, in terms of strength, absolutely belongs to a Third Tier powerful demon. Although it lacks the 'Domain' compared to a true Third Tier, it still has a significant gap compared to Lynch, who is at the Middle Stage of Mystical Level.
