sentences:  Using his stolen power, Slizzath captured Tempest and Atlan, raised an enormous undead army, and finally transformed the Hidden Valley into the necropolis of which he had long dreamed.Tempest eventually broke free of his prison and found the remaining Idyllists, hiding in Thar's old armory.There, Tempest was reunited with his mother and the truth—that the fearful Idyllists were so terrified of the release of Slizzath, they lied about Thar's sanity and saw to it that Garth was banished as an infant.