For 10 points, name this event in Hindu mythology in which a great body of a certain substance is well-mixed.
A figure who disguises himself as a god in order to reap the rewards of this event is beheaded for his crime, after which his severed head occasionally swallows the sun, causing solar eclipses. A figure who is traditionally created during this event is welcomed into the home by cleaning the house, after which an idol is bathed in water, in a ceremony that is said to bring wealth to a family. This event, which produces a cow that grants wishes known as (*) Surabhi, involves the participation of Shesha, who adjusts his younger brother's head. It produces a poison called halahala, which a god tries to swallow, causing his throat to turn blue. The tortoise Kurma provides an axis around which the body of Vasuki can be used to carry out this event, which produces amrita nectar. For 10 points, name this event in Hindu mythology in which a great body of a certain substance is well-mixed.
A figure who disguises himself as a god in order to reap the rewards of this event is beheaded for his crime, after which his severed head occasionally swallows the sun, causing solar eclipses.
churning of the (cosmic) ocean of milk [accept "sea" for "ocean"; or Samudra manthan; or Sāgar(a) manthan(a); or Kshirasāgar(a) manthan(a)] 