The Legend of Augustine

It's a world of humans, dwarves, elves, gods and demons. Each region has made a vow not to interfere with each other, but a few hundred years ago the devil suddenly broke the contract, killed many humans, dwarves, elves and gods, the four races united with each other to seal the devil, and the gods were all sacrificed in that war, and since then there is no god race. This time the demons will come again, how Augustine and his friends will save the world?