Readers may have noticed that there is no real example of the two gods fighting. Yes, Rhinesvelt does destroy a fragment of Helskor that manages to drive him insane, and yes, Rhinesvelt also briefly fights a group of humans who do hold Helskor's power. But you never see the two gods attempting to destroy each other directly. As the Day of Whispers became an established reality, these two beings rarely entered combat outside of this one day.
Before this, the gods had to learn the rules of their imprisonment. They had to test out their abilities. Part V, now titled "Plight of the Gods", will go into these details. There will be at least two of these battles, one occurring near the beginning of the book, the other near the end. Much about these battles has been written already. You could say they are complete, and I hope it is done well enough so that you can visualize the epic scenes I am imagining. These are not the only examples of fighting in the story, and there is one particular struggle that will likely trump both. I expect the fifth book to be the most exciting out of the six, even as the sixth wraps up the story and holds its own plethora of surprises.
Compared to the book before it, I am far more excited as I write this content. Writing is not as difficult. Still, the plot of the book remains under construction and will likely take several months to complete.
