Yagim Mask at the Metropolitan Museum of Art, New York, USA. Yagim Mask, 1920-25 Vancouver Island, British Columbia. Wood, paint. George Walkus (kwakwaka'wakw, ca 1875-1968). A furtive aggressive sea creature known as Yagim was part of the dramatic Tseyka performance cycle, which took place during the dark winter when life on the North West coast moves largely indoors