"Solstice and others spirits of stars are a special case. I don't really hold their soul in the true sense, I just let it pass through their star to be reborn. The other souls pass through the nearest Heart when they are ready. If you get a mortal wound it must be healed, otherwise you would return to just die of it again. Three hours is my estimate of healing such a wound and passing through the Heart. It can't be done faster. But I'm thinking, in the worst case, I could keep you alive for a while even with a mortal wound, if I constantly heal you. I need to be touching you for that, but touching your cloak could be enough, not to heal the wound, but to prevent it from killing you."