Also known as Lord Mahesh, Shiva is the Destroyer in the Trimurti. Developed from Rudra, the Vedic god of death, Shiva is often shown sitting on a tiger skin and riding the bull Nandi. He is also associated with a lingam (phallus). He has three eyes, of which the third (in the middle of his head) is all-knowing; when it opens, the world is destroyed and regenerated. Lord of all underworld beings, he wears a necklace of skulls and another made of a snake. He carries a trident as a weapon and has a blue throat, the result of drinking poison while the ocean churns. Parvati, one of his several consorts, bears him two sons: Kartikeya (the god of war) and Ganesha.