Harry Potter- necromancer system rise

Edward a person of the earth who is beaten by bullies every day just for being emo. They say that he is a Satanist and beat him more until one day he did not warm up anymore, gave up his life and threw himself from a building to end his suffering. Little did he know that his suffering was about to begin. (I know the synapse sucks but give it a chance. I am a Brazilian writing so my English may be a little out of shape and too correct and maybe have errors please correct me and please read and do not judge just because I am from another country.)