Knowing the Hollow's darkness will eventually consume him, Klaus Mikaelson prepares to sacrifice himself to ensure his daughter's survival.
It reinforces the show's central theme that the Mikaelson bond is both their greatest strength and their ultimate burden. [S5E13] When the Saints Go Marching In
The episode marks the completion of Klaus’s centuries-long journey from a paranoid villain to a selfless father. Knowing the Hollow's darkness will eventually consume him,
Other family members find their own resolutions. Rebekah finally decides to take the cure for vampirism to live a mortal life with Marcel , while Freya and Keelin look toward a future with a child, asking Vincent to be the father. The Ending [S5E13] When the Saints Go Marching In