HOLY EMPEROR’S GRANDSON IS A NECROMANCER is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, English chapters have been translated and you can read them here. You are reading chapters on www.holyemperornecromancer.org fastest updating comic site. The Summary is

Our MC dies from an accidental electrocution and ends up inhabiting the body of a young prince in another world, his new profession being the Necromancer he chose in the game he was playing before his untimely demise. However, things are not what they seem – including his own Necromancy skills!