Wudao Achievement Gone Wrong

Wudao Volga is a 17 years old teenager that was raise in a family of five. He was playing Diablo 3 one day during summer break but somehow got an achievement that was not suppose to be there. Excited by the thought that Blizzard added in an Easter egg he goes through a serious of event that led him to being teleported into a middle of a battle field. He was godly overpowered so he won easily but the system that summoned him screw him over and deleted all his items accept one due to a certain action of his. How will he carry on living in this new world called Valha which is very similar yet also very different from Diablo 3's world....