Bang! Bang! Bang!
Darnell's Sunrise Warhammer smashed into those bodiless ghosts, and, surprisingly, it made a sound as if hitting a solid entity, directly dispersing them.
This was the power of Undead Disintegration taking effect; whether you were physical or spiritual, if you were struck by the Sunrise Warhammer, you had to engage in a willpower contest with Darnell.
Willpower contests may sound complex, but in reality, they are quite simple—the contest of perception.
Darnell believed the undead were dead, and the undead believed they were not dead. When Darnell's denial overcame the undead's perception, he won the battle of wills. His perception, fueled by magic power, took effect, and vice versa.
As a Transcendent at the peak state and a Holy Warrior, Darnell's will had been forged to be unbreakable, especially with the Sunrise Warhammer in hand, enhancing this belief. Not one of the undead less transcendent than him could withstand a single blow from his hammer.