Fate of the Gods by Angelina Bruno

As the final stages of God training begin, Nicodemus and his friends must face their greatest trials yet. Every lesson, every sacrifice, and every battle has led to this moment, but claiming the most powerful role in the universe demands far more than strength.
As the embodiments of Life and Death, Nicodemus and Odysseus discover that every choice they make ripples across creation. Their hard-fought victory over Pandora should have brought peace, yet instead it uncovers unsettling truths that threaten everything they believed they had accomplished.

Then a new enemy emerges.
Evander Ambermourn is determined to unravel Atlas’s centuries-old mission of imprisoning the legendary Four Horsemen. As his obsession grows, so does the danger. If the Horsemen are unleashed, the balance of the universe could shatter beyond repair.

With alliances breaking, time slipping away, and destiny closing in, Nicodemus must confront the greatest challenge of all: becoming God isn’t simply a test of power, it’s a test of who he is willing to become.

The final battle for creation has arrived. The fate of every world rests on the shoulders of one boy standing at the edge of eternity. Will Nicodemus rise to become the almighty force he was destined to be, or will the weight of infinite power consume him before he can save everything?