There is an image of this cultivar on the Hosta Library. From the photo on the HL website, it appears to be a giant size (36 inches high by 36 inches wide) hosta with slightly wavy, green leaves and yellow marginal variegation. This non-registered cultivar was originated by Serge Fafard of Les Jardins Osiris in Canada. 

Osiris (Egyptian god and nursery name)