The Emperor was infuriated for letting both of his prey escape. He did not understand how the human with the Draconic Core and Heart of the Cosmos survived the plane's explosion or where the one with another Ancient Magic Core escaped to after entering the Land of Desolation. He tried searching for their traces for several days yet failed miserably.
Since he could not pick up their traces from their last location, The Emperor decided to return first in Somuli where they first discovered the human with the Draconic Core and Heart of the Cosmos. Though The Emperor already suspected the human was not from there but from the Human plane, he reckoned he would return there since he appeared to be protective of that plane's residents.