When the Ancestor of the Five Elements fell, he was only at the realm of an Innate Dao Sovereign, yet these five Innate Divine Demons, after years of cultivation, were all at the realm of Innate Dao Sovereigns, on the same level as the Ancestor of the Five Elements.
Indeed, the Ancestor of the Five Elements was dead beyond any doubt, but given the sameness of their original source and the exchange of five for one, these five Innate Divine Demons managed to bring the Ancestor of the Five Elements back to life.
This was surely a life-saving grace. With such karma in place, even if the Ancestor of the Five Elements was unwilling, he would have to comply with the final wishes of those five Innate Divine Demons and step forward to protect the Five Elements Clan.
Today, the reason why the Ancestor of the Five Elements appeared here was in response to the request of the Five Elements Clan; he had to come.