The ultimate reality is brahman, existence, consciousness, presacit anand o. This is the absolute reality. Nirguna plus maya, the power of maya, is called saguna bram - a god with attributes. Saguna bram what is called in shiva, or vishnu, or naran, or davy in various streams of hinduism and christianity. It's also known as allah by some religions such as judaism,. The creator one common in all theistic religions: it's the power which creates the universe.