You are combining martial world elements in this novel make a cultivation technique of asura sutra and sacred Scripture, Asura path. In it you have use three wheeles could be used for attack too.it used negative emotion and souls to cultivate mortal body,combine blood vitality and mana to achieve purest form of energy and sous to refine your own soul and sacred scripture function to control your life and death , you could control function of your own body you would unbounded by concept of life and death thus granting half immortality shape the function of your bodies as you life destroying your natural weaknesses and adapting your body to resist damage like Hercules god hand.
Seriously the dragon slayer sword would damage jason his bloodline is highest of dragon. Although dragon slayer sword could damage dragon but how does it make sense a dragon slayer weapon of lower world could be used use to damage dragon of higher world there has to be some condition.
I want to the conditions of dragon slaying weapons
Option 1
Dragon slayer weapons power depends of the dragon used to make it.if Dragon is stronger than dragon used to make weapon by a high-level it will not work.
Option 2
Dragon slayer weapons depend on bloodline of the dragon
Fayed