King Viktor was not convinced that the mortal Emma could escape so easily. He was sure that she was in the palace. The ritual was about to start and according to Lazarus, if they didn't find Emma, they would take Gladys to the temple. Though he didn't mind sacrificing his daughter, he wanted it to be Emma. The girl was Lazarus's mate and once he claimed her, she was going to be even more powerful.
The moon was going to be at its peak in less than half an hour. He had purposely not gone to the temple only so that he could quietly find Emma in one last effort.
When he saw that the palace was quiet, he started to comb it on his own. He traced everywhere to look for Emma. He suspected that she was at Yul's place, but when he traced there, she wasn't found. He came back to the palace and started thinking where she could have gone. Only a few minutes were left for the moon to come at the peak.