Page "Deryni" Paragraph 16

In addition to their genetic basis, most Deryni abilities must be trained and developed.

While basic arcane skills can be often be mastered during adolescence, more complex abilities and talents may require constant study and practice throughout the adult life of a Deryni.

Deryni adepts such as Camber MacRorie and Wencit Furstán of Torenth continue their arcane studies throughout their lives, enabling them to wield powers far beyond the abilities of many of their contemporaries.

Conversely, Queen Jehana of Gwynedd, a full-blooded Deryni from an ancient and powerful lineage, is barely able to perform the most basic of Deryni talents, due to her lack of training throughout much of her life.

Regardless of the inherent strength of a Deryni's natural powers, proper training is essential for those powers to be of any practical use.