Just like the elder sister left a dense array of thunder on Winding Hill, continuously engaging in some kind of corpse-whipping operation.
As a 'rival' who once challenged his position, with the sinister personality of the Mysterious Shadow, He Ao couldn't believe that he didn't leave any contingency on the Wizard Emperor.
After all, Usurper Gods are really hard to kill. If he wasn't completely dead, and the Wizard Emperor had some resurrection tricks, wouldn't that enable the Wizard Emperor to rise again?
The last Usurper God He Ao saw, Andaville, is still trying to rise again.
And this Holy Shadow left on the Emperor of the Starry Sky looks quite 'appropriate'.
The background story says a young wizard who obtained ancient legacy found the battlefield.
And the era when that young wizard was active was already the era of Holy Religion; during this time, wizards may not have fared as well as in the Magic Empire era.
