According to Bengali folklore, Ailis are evil spirits who prowl through gloomy woodlands. Their primary objective is to divert weary visitors’ paths and ensnare them in unfamiliar territory. The Ailis are considered to be one of the most deadly beings in Bengali mythology since they often grab their prey just before sunrise and just after sundown. It may create illusions to divert the mind of a traveller, slowly making them lose themselves in the deep woods, never to return.