Ouyang Lin naturally knew that a simple large-area AOE skill could not possibly annihilate the entire Skeleton Cavalry Corps.
So after he cast the tornado storm, he began his second spellcasting.
This time, it was also a large-area AOE magic but with the added functionality of pulling and gathering enemies, called Howling Wind Vortex.
This was a vortex created by the collision and entanglement of five huge wind blades with countless smaller wind knives, forcibly dragging and grinding the surrounding creatures into its whirling embrace.
The scale of this technique was massive, leaning more towards control than high damage.
However, the Ghost Knights, having pushed through the tornado storm, had already suffered a wave of AOE damage—either reduced to bone dust or severely wounded and low on health; even those with the lightest wounds had lost half of their health bars.