Even if C'thlyanu himself decided to go and confront death, the clash of their Celestial Mana would destroy millions of worlds without any effort and cause more damage than anyone could imagine! And at the end of that battle, C'thlyanu would only be holding the Celestial back for a short while, since neither of the Celestials could kill the other! Jason's plan was literally the best chance that they had right now, and C'thlyanu would bet everything he had on the hope that Jason could succeed!
Once C'thlyanu gave his word to Jason, all the other members who had been holding back realised that they didn't have any choice either in this matter and they raised their hands and finally swore their support for Jason's expedition. Once Jason had the support of these people, he nodded and spoke.
"Thank you for giving me your support. I'll be heading towards the ninth domain within the next day, but you should continue your evacuation efforts until you receive news of what happened."
