The Prince, The Knight, and the Warlock's Apprentice

Once upon a time, there was a prince, a knight, and a warlock's apprentice. The prince's heart lit up the world, but the prince struggled to hold his light inside. The knight's heart carried great weight, yet he couldn't carry his own burdens. And the warlock's apprentice had a heart black as pitch... or so he thought. For when he met the prince, something changed...