Solstice was was lying on the floor, unconscious. She was veiled in a golden glow. Cadon watched her changing but dared not to get close. Regeneration is a tricky as it is, let alone when raw Time Vortex energy is involved. Just witnessing it could drive you crazy. Absorbing it, it would turn you into a God... if it doesn't kill you first.
That's where he led her. He had to go and steal a TARDIS to meet some man with no relevance to his life other than shared genetic make-up. He had to exploit the only person that was ever nice to him. Get her in trouble. Get her killed. To meet a man who was too coward to look back at what he has done. A man that played god in every chance. All these regrets were echoing in his mind, blending with the sound of the bell.
He tried to focus. A bell. What could that sound mean? What was it's significance? It couldn't be good. Then he noticed. The ship was in fire. The emergency circuits failed. Crash was imminent.
He looked at her again. The glow was gone. She was different now. Hair was shorter, definitely. Solstice had long brown hair which she refused to style in the Gallifreyan norm. Also, she seemed somehow smaller but he couldn't exactly place it.
He passed out before being able to notice anything else. The TARDIS died as the hit land.