He saw his beloved prince died in front of him, killed by the king's great sword because the crown prince chose to protect the farmer's son and fought against his own father. The poor young farmer that reported as a warlock to the kingdom's church by the villagers, he gazed to his lover's body with wide eyes.
Taehyung screamed Seokjin name with teary eyes, everything turned red as his voice changed into something inhumane and the cross behind him burnt with blue fire.
Maybe the report wasn't fake after all, but a little bit wrong.
Taehyung wasn't a warlock.
He is the demon lord every warlock and witches worship.