Acing

When one of the dice in a Skill Roll results in its largest possible value, it is considered an Ace.
In these cases, the same die must be rolled again, and its new result must be added to the old one.
This can happen in parallel, if you get the maximum possible result with both of your dice in the same roll.
Rolls can also Ace many times consecutively with the same die, adding the new result to all the previous ones.
In this way, it becomes possible to achieve very high results even with small dices, which makes possible to get Raises, no matter your dice size.
If you need examples, check out Skill Rolling Examples.