Samudra manthan
Halāhala (Sanskrit हलाहल) or kālakūṭa (Sanskrit कालकूटं, literally: 'black mass' or 'time puzzle' ) is the name of a poison (as per Hindu History) created from the sea when Devas and Asuras churned it (see Samudra manthan) in order to obtain Amrita, the nectar of immortality.