Each hero shows a number of die faces.
For example, the Dragon Slayer shows a tool die’s shield face and a magic die’s one-magic face.
A player uses and scores these hero die faces as though they were physical dice in their trove. The only exceptions are that they are not rerolled between rounds, and they cannot be rerolled with magic dice.
So, for example, one magic faces can be spent for rerolls in the Magic Phase, tunnel faces showing 1 can be scored as the first die in a multi-die sequence in the scoring phase, and so on.
Each face shown on a Hero can be used or scored once per round.