User blog comment:Xilinoc/Ch. 615 - All is Lost/@comment-24531362-20150212224034/@comment-5551986-20150216230402

Theres not really a good answer for that. But maybe Yhwach wants to create a world without souls and the need for balancing, maybe even create his own world?

He is slightly like the joker, just less..jokey. He just wants to watch the world burn maybe?