N, Ghondor, and Na'el

Faced between the choice of his granddaughter Na'el, who has be possessed by an omnicidal entity, or his father, who has joined the ranks of Moebius and slaughtered the City just to draw out said entity, Ghondor jumps between the two and takes a fatal blow for Na'el, preventing N from killing his great granddaughter. N is horrified that his son died by his hand, but Ghondor chose to place his faith in the next generation to guide the world.

Example of:
Offing the Offspring