It had long forgotten its life as a mortal, stopped counting birthdays aeons ago, both original birthday and new birthday. It tested what might happen if it altered a society, built life from scratch, or interfered constantly. Time moved so fast for it that by the time it made an adjustment, 500 years had passed abd people forgot about its existence. It mattered little to it, it was merely interested in what happened.
It would watch young civilizations die from a single mistake, and others thrive for millenia and stretch out into the stars, but it always ended the same in the eyes of this god; universal extinction. No matter how advanced they became, eventually the universe would end in dust, all the black holes dying off, all energy exchange halting, everything growing dark and falling still. Then all matter would converge again, crush together and a new big bang would occur, stars emerging, life reoccuring. Naught lasts forever, yet all persists unto eternity.
It had a bird's eye view of existence, of time itself. It didnt see time as a linear progression anymore, it saw time as everything simultaneously happening at once. Its very existence warped time and reality without it needing to do anything. Despite it remembering dying in a human body and then ascending it had never encountered another of its kind. As far as it knew it was the ruler of the universe.
It was lonely