Board Thread:General Discussion/@comment-35299017-20200423233246/@comment-29325824-20200424141709

Well, thing is, Yhwach's original plan was just to kill the Soul King and be done with it. But Mimihagi's unseen interference scared him, hence why Yhwach absorbed the two instead, to make sure they couldn't do anythign about it. He then probably waited a day or two just to make sure no other surprises would happen.