The 5 heroes of Etheria

The story is about a boy named Tyson who started having problems in the human world after his death he woke up is a strange place were a gurdian gave his the ability to infinently get stronger. By leveling up in exchange he has to go to the world Etheria to defeat the great demon king zamazar on his way he fineds out that his friends. Have also been dealing with the same problams and now they are going on the same jurney to defeat the great demon lord zamazar than go home and most importantly leveling up along the way.