"I don't need you to bring him back! I just need someone to lead my men outside! Lead them to the people that Karyk holds dear in the outside world! We can't bring him back by force but we can definitely force him to come back!"
The Patriarch didn't want to personally leave this place since even he wasn't confident in fighting anyone outside the Nether Realm.
Moreover, if the Upper Realm found out that he had left this place and sent someone to kill him when he was outside, it was even more dangerous.
He wasn't as worried about facing Gabriel as he was about facing those old monsters from the Upper Realm in their domain. That's why, he only wanted to send other people to bring Gabriel's dear ones to the Nether Realm where he could freely do as he wanted!
"Fine. I'll go with your people and help them!" Elora agreed right away! Anything was better than dying.