Please teach me

Ren's body started healing at a rapid pace and what accompanied that was his mana started running amok. If not for Lara who had concealed Ren's mana within the workshop, everyone near the vicinity would've fainted and the knights would've already surrounded the workshop. 

This phenomenon was happening since Ren was unconscious and his body was using a large amount of mana to heal itself. Due to his mana being so large and wasn't being held back it was in an uncontrollable state as it raged around the workshop. It took everyone present just to hold back Ren's mana from going berserk.