The plan to kill the Universe Owner of F974 was to use a natural formation and its energy to finish him off. That same formation would be used to open the channel to Lisan once they got an Universe Owner on their side. After Tharos was added to the plan, everything sped up, as he could stabilize all the incredibly volatile energy that was being absorbed and stored.
Tharos then received the help of the other Primordial Demon Beasts that Roan said to go to F974. After putting the plan to work, they eventually killed the Universe Owner.
Who became the new Universe Owner, then? His name was Coddin, a Divine Silver Phoenix who ended up being selected by the Demon Beasts' Races. Thanks to the Universe Root Egg, Coddin had his breakthrough into the Celestial Realm and was now with F974 in his hands.
