Watching Master Yong leave, Di Tou was speechless for a while. To be honest, after actually working through his plan, he found there were indeed quite a few issues and complications. The main one being that ultimately, formations weren't miracle makers, and functioned like machines. They used energy to create a cause and effect, which also meant that they couldn't make something from nothing, and couldn't make something into nothing either.
It wasn't like his Void Qi, where a simple spray would return things to an empty state.