It&rsquos a bird. It&rsquos a plane. It&rsquos the Garuda. But this king of birds is no mere plaything. For centuries, Sri Lanka&rsquos demon masks have been used by witch doctors in cathartic dance rituals to fend off the evil eye and cure diseases. Originally, masks were only vegetable-dyed. The price of revival is enamel paint, and bright, cheery demons. Ambalangoda town, 90 km south of Colombo on the Galle Road, is the mask capital of the emerald isle. You can get a teeny one for Sri Lankan Rs 50. It&rsquos all skywards from there.