After obtaining the corresponding domain, Duncan's 'Spartan Fury' was also activated, sharing the corresponding frenzy state with the Primal Fury.
However, the source of power for the two differs.
Spartan Fury uses the divine power of the ancient Greek gods. Unless he becomes one of the ancient Greek gods, the switch for the divine power lies with Athena. If she doesn't lend him the divine power, Duncan can only activate the Primal Fury, and cannot activate the Spartan Fury.
One can have a sword unused, but must not be without a sword.
Duncan does not wish for the source of this power to be under someone else's control, so for him, Spartan Fury is considered an additional enhancement, not his fundamental power.
He tried to mobilize the divine power of Spartan Fury a little, and indeed it was much stronger than the Primal Fury.
Perhaps it is because the ancient Greek gods are somewhat stronger.
All spirits seemed to have sensed something.
