rang thog tu rang grol ba

Essence kaya (ngo bo nyid kyi sku); Skt. svabhavikakaya. The 'essence body,' sometimes counted as the fourth kaya, and constituting the unity of the three kayas. Jamgon Kongtrul defines it as the aspect of dharmakaya which is 'the nature of all phenomena, emptiness devoid of all constructs and endowed with the characteristic of natural purity.' [RY]