The ending of the SNCW goes like this:

When Procyon gets berserk mode and kills Gigan, LuLu, John, Tom, Centinel and Dennis, He tries to kill Radon but made him unconscious, Afterwards He got shocked how Neos and Mandy survived when he killed him but they played him all along, Neos focuses on the shadows while Mandy focuses on Procyon, She defeated him and Thoughts began to kill Procyon, While Radon started to wake up, he discovered that his sword can kill Vitali, then he gets extra power from Light to be able to fly to the pyramid, He slays Vitali completely obliterating him and the planet Ciemnosc itself The Shadows and demons managed to escape but were caught by the blastwaves Although some survived, Emma quickly ran up to him and finds him lying on the ground, completely hurt Other people began to come to his aid, But it was too late, He began to pass away leaving Emma in tears, Light discovered that he must go back to his dimension in order to heal, Leaving no choice, 4 Days later Mandy spoke to Emma that other shadows might be living in the planet so that they could slay them to make history just like his brother, Emma agreed and then the storyline continues on Catastrophic Warfare: New Beginnings

The end, RIP Radon

This goes well with this music i think