Found It

At the same time.

Neal manor.

In the pavilion, Frediano Jadanza and Westley Hader were chatting when suddenly, Frediano's face showed shock and anger. "Big brother's aura has disappeared!"

"Luther's aura is gone too!"

In an instant, Yuri Qualls arrived. 

The sons of the Northern Army could no longer sense Braydon Neal's presence.

Nor could they sense Luther Carden's aura.

Luke Yates clutched a dim soul lamp, his voice trembling with fear. "My brother's soul lamp is out..."

"What?" The others turned to him.

"What happened?" Syrus Yanagi demanded angrily.

"He entered a strange place. Don't worry, someone is more afraid of his death than you are," Heather Sage said as she tended to the flowerbed.

This sentence calmed the others. 

They all knew her identity—she was the Ruins Lord, guardian of the universe's origin, and the master of this universe. 

If she said it was fine, then it was fine.