According to Ezeudu, what is that "Umofia has decided?"

According to Ezeudu, Umofia has decided that Ikemefuna should be killed.

“Yes, Umuofia has decided to kill him. The Oracle of the Hills and the Caves has pronounced it. They will take him outside Umuofia as is the custom, and kill him there. But I want you to have nothing to do with it. He calls you his father.”