Stephen had planned to poison the wife of Samuel , Luna whose origins were unknown, as Samuel hadn't told anyone. No one even knows of her element to atleast make some guess as everyone was sure that she would be famous in her birth place due to her angelic beauty. Even Stephen who was ready to do anything for the throne , forget about his goal and got mesmerized due to her beauty but his determination to destroy everything dear to Samuel ,got even stronger than ever when he got to know that this beautiful woman with rare golden hair and sky blue eyaes was wife of his greatest enemy , Samuel.
His mind whose condition is not well , thought that Samuel wanted to steal everything dear to him.
So he decided to kill the reason of Samuel's happiness to make him mentally weak which would greatly help him , as mental power play important role to use power to its full potential.
Stephen has illegally imported a nasty poison which would make one' power
out of control and and destroy their energy channel which would make one feel unbearable .
This poison was made by helpless alchemist whose family was killed by the arrogant young master of demon noble family. He wanted to make the young demon feel same amount of pain as he had given to the Alchemist family.
This poison was named as pain bringer due to its nasty effects to bring unbearable pain .
But this poison was later declared as banned in many kingdoms and empires and Deathstar is one of them. He had to use his many resources just to buy the poison not to mention the cost to import it as it was rare to find it now a days.
This poison can be used in many ways and Stephen had already decided how will use it to see the pained expression of Samuel.
"Samuel , I can't wait to see that pained expression on your face."