Later, the alien warrior Beta Ray Bill comes to the defense of Earth during a war with Surtur and his demon army. In the midst of battle Sif and Bill find themselves attracted to each other. Meanwhile, Lorelei has given Thor an elixir that causes him to fall in love with her, and he is so blinded by the spell that he strikes Sif in anger. When the war is over, Sif and Bill spend some time on Earth exploring their mutual attraction before returning to Asgard. Sif eventually returns and finally comes to forgive Thor after she realizes that Lorelei was to blame for his brutality. However, she clarifies to Balder that her love for Bill is purely platonic.