"I had nothing to do with their deaths," Loki replied with honesty. "I was able to save Sif at the last minute because Hela still believed me to be her lap dog. She thought I would have no issue murdering Sif in cold blood." Loki flinched, already regretting admitting the next part. "I was weak by then, though. My magic was waning and I thought that she would see through the illusion. Somehow, she did not."