Ep 46. The Mirage Makers

The Lightning League lands on a desert planet with no plant life, assuming that is where Audric would be. They are mistakenly led by a mirage of Audric to try and rescue him but they are attacked by the native nomads who have been tricked by Saw Boss into believing Jayce is bringing a deadly plant to destroy them. Gillian devises special glasses to reveal the mirages from the real thing. Brock and Oon fall into big holes and discover an underworld with Monster Minds. The nomads and the Lightning League join forces to rout the Monster Minds.