Zachary Zatara
Zachary Zatara is a fictional character in the DC Universe. Zachary is a descendant of the Homo Magi just like his cousin Zatanna and uncle John Zatara. He first appeared in "Teen Titans (vol. 3)" # 34, and was created by Geoff Johns and Tony Daniel.
Zatanna
Her magical powers increase if not used, but overuse can deplete them to the point that further use strains her physical well-being; as with other magical users, the only way to restore her waning powers is an extended period of rest.