User blog comment:B214/General Discussion/@comment-29963364-20161028202621/@comment-9595671-20161031200758

I think they didn't get Great Red to help because of not just that, but finding him in the Gap would take a long time and likely too long to make it in time.

Plus the reason why I think they needed both him and full power Ophis to truly end it may related to Trihexa's regeneration, likely the best way to kill him without causing the collateral damage that would defeat the purpose of stopping it.

Well, consider how Cao Cao likely got the way he did and if Indra made him that way and indrectly birthed the Hero Faction... let's just say he can probably be charismatic enough to get more help.