Patrick Stewart, who has starred in numerous major theatrical releases, including "X-Men," "X-2: X-Men United," "Conspiracy Theory," as well as "Star Trek: The Next Generation" television series and feature films "Star Trek: Generations," "Star Trek: First Contact," "Star Trek: Insurrection" and "Star Trek: Nemesis" will give voice to Khelban "Blackstaff" Aunsun - a wizard of legendary power and wisdom. Michael Clarke Duncan, who has appeared in feature films that include "Daredevil," "The Scorpion King," "Planet of the Apes" and "The Green Mile," will provide the voice of Ygorl, the evil Slaad Lord - a bloodthirsty conqueror from a mystical realm of chaos.