Half-divine founder of the Shilluk Kingdom (c. 1490 CE); son of the mortal king Okwa by the crocodile-river-goddess Nyakaya. Twin (or near-twin) of Duwat; defeated by him in succession crisis; migrated north along the Nile to found the Shilluk Kingdom at the Sobat-Nile confluence. The half-crocodile form inherited from his maternal line; the rain-mastery and Sun-defeat the divine-attributes that mark his demigod-status. Disappeared in a whirlwind rather than dying; his spirit continues to inhabit a wooden effigy and is invoked into each new Reth at coronation. Every Shilluk Reth from Dak (his son and immediate successor) through Reth Kwongo Dak Padiet (1993-present) is institutionally Nyikang for the duration of his reign — the longest continuous demigod-spirit-kingship in any human institutional tradition. Subject of James George Frazer's Golden Bough and David Graeber's 2011 HAU paper as the classical anthropological case-study of divine kingship.