Discovery?
No, the clandestine observer in the Void was very skilled at hiding; Leonard Churchill did not find this observer.
It's just that the commotion caused by the Forbidden Curse was so great that in the reasoning of "I am the world," there should be such a person.
So he tried a test on a whim.
It can be considered an "unexpected" within expectations, startling such an enigma prowling in the dark.
Of course, the other party might have also guessed that they were not truly exposed.
The initiative to show themselves is probably out of curiosity.
And he would certainly not stand idly by as these ascetics were being killed, nor would he allow Leonard Churchill and his group to escape.
He would definitely take action.
...
Leonard Churchill watched as the man with a composed smile and blonde hair slowly emerged from the Void. He glanced at the violet golden patterns on the edge of the man's Divine Robe, and had already guessed the identity of the newcomer.