Magical Spear Heritage

*In his previous life he was just a normal boy who dead miserable in front of his parents. Because he had great compassion in his previous life, after passing the trial arranged for him by the Shura, The King of hell - Hades agree to give him a second chance to live again in another world！ 
Now as the baby in this world where the strong are respected and the weak are ants., what is he going to do?