Lady Death: Intergalactic Tournament

The main character is Death. She takes part in battles and wars as an observer. She watches when someone dies alone in the forest. While her daughter is at war with the Angels, one of them kills her during the battle. Death, which usually does not take part in the bloodshed - murders all the Seraphim.

As punishment, she is imprisoned on an alien planet - Earth, where there is no life yet. She is stripped of all her powers.

When humanoid beings arrive on the planet in the twenty-first century. People learn about the Intergalactic Tournament in which most of the developed species take part.

Death decides to set off, pretending to be an earthling.