Do I have to be the Sacrificer?!!

Celestia's POV: 

I stood still in the cold dungeon for a few minutes without even moving my muscles slightly. Eternal sacrifice?!!! 

When I was able to move my muscles again, I sat down on the cold surface and recalled what I read about the term 'Eternal sacrifice' in the manuscripts. 

That is the noblest sacrifice out of all! The sacrificer has to step into the Holy Fire and offer his life as a penance to the sins committed by everyone else in the realm. 

This kind of sacrifice always pleases the Almighty so much that he forgives the sins of everyone and gives absolution to the people. 

Father Oberon said that it is the only way to redeem the side of light! So I have to be the sacrificer? Or else the side of the light will diminish!