Fate’s Requiem

One day, a young boy named Lugh happen to come across a ancient stone with the soul of a low level devil. This stone gives it master special abilities making them potentially the strongest beings of their times, but it was different for Lugh. Because his body couldn't handle immense amount of mana he was rewarded with another ability, Imagination. How will Lugh use his new powers? And will he be able to overcome the endless foes he'll eventually meet on his journey?