It was difficult for the three mighty Hegemons to slay Archon-rank Emperors, precisely because the Emperors could use their invulnerable forms to flee. However… if they were trapped in illusions, they would be unable to escape or to maintain their invulnerable forms. Their minds would've been drawn into the illusions, allowing them to be killed.
Heartforce Emperors were the terrifying stuff of legends. The entire Flamedragon Realmverse didn't have a single Heartforce Emperor in it at present. For Heartforce Cultivators to succeed in the Daomerge was far more difficult than for those who trained in any other Dao; most likely, it was second only to those who walked the path of the Omega Dao. Heartforce Cultivators had to have extremely large and stable heartworlds if they wished to have a chance at the Daomerge.
