Duncan now needs to rest for two days.
Even though he wasn't severely injured in the battle with the sea monster serpent, he activated the Great Frenzy and entered a state of exhaustion for a full day and night. Moreover, his waist and abdomen were slightly injured, and by the time he returned at midnight, the skin around his waist was rubbed raw, so he must apply some medicine and recuperate properly.
Reality is not the Heroic Spirit Hall, after all.
The side effects of Duncan activating the Great Frenzy were quite significant; he directly entered a reckless state, completely devoid of the concept of fear.
He dared to face anything, dared to chop at anything.
