Dhumavati, "the Smoky One" with Sleeping Vishnu

Dhumavati is said to manifest herself at the time of cosmic dissolution. She is described as a giver of siddhis, a rescuer from all troubles, and a granter of all desires and rewards, including ultimate knowledge and moksha (salvation). Her worship is also prescribed for those who wish to defeat their foes. Dhumavati's worship is considered ideal for unpaired members of society, such as bachelors, widows, and world renouncers as well as Tantrikas. In her Varanasi temple, however, she transcends her inauspiciousness and acquires the status of a local protective deity. She rules over the four months of the rainy season, a period during the year when the god Vishnu sleeps. (Wikipedia)