Actually, Sheyan been instantly enlightened after beholding the parasitic assaults from Travice.
"Ah, Most likely, the bodies of these Caucasians who voyaged from afar, carried parasite worms unique to Europe!"
"The climate and environment of Europe and Africa differ greatly. This inevitably leads to the breeding of different organisms. Parasites found in Europeans would probably not be found in Africans or vice versa. Or perhaps due to the eating customs of the Ndipaya aborigines, whose diet comprises mostly of herbs, fruits, and vegetation, parasite worms wouldn’t exist in their guts or bodies. Therefore, after consuming the ‘Stairway of the Sun’, the terrifying powers of would directly translate into their bodies; causing them to lose control and morph into existences such as the Lickers."