Complete story — includes the ending
Massimo strives to make his mother proud by beheading Bo, whose heart must be sacrificed to close the portal to the underworld. After eating the seed containing all the powers of the dead Una Mens, Massimo goes to the Dal, kills Rainer, and beats up Bo. Bo kills Massimo after Lauren seized the Twig of Zamora that protected him and destroyed it. Kenzi discovers that she is Bo's heart, and walks into the portal, sacrificing herself.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Lost Girl season 4. HTML formatting and reference markers removed. · Content license