Complex sentence: She later betrays him and helps act out a plan that led to the destruction of Mount Weather, after the events of The city of light she blames Skaikru for all the casualties and demands for Clarke's execution.
Split into simpler sentences: She later betrays him and helps act out a plan that led to the destruction of Mount Weather. After the events of the City of Light, she blames Skaikru for all the casualties and demands for Clarke's execution.