To Karvuvu is the younger and foolish of the Tolai creator twins, the inept or heedless brother whose mistakes brought death, ugliness, and hardship into a world his elder had made good. The best-known myth makes him responsible for human mortality: To Kabinana had ordained that people should slough their skins like snakes and so renew their youth forever, but To Karvuvu bungled the arrangement, recoiling from his own rejuvenated mother, or handing the power of skin-shedding to the snake, so that snakes became deathless and human beings die. Other tales trace to him the man-eating shark, warfare, and assorted spoiled imitations of his brother's works. He is a trickster and culture-antihero rather than a malicious devil; his failures are those of stupidity and impatience. Sources differ on whether he is one and the same as the figure called To Purgo in the neighbouring traditions.