Unsong chapter 30 describes a climatic duel.
Then the Other King himself took the field, ripping through the Comet King’s troops with secret Names of fire and night. The Coloradan line began to buckle. And so the Comet King, looking terribly old with his white hair and lined face, strode to the front of his ranks and challenged the necromancer to single combat.
They fought high above the earth, darting in and out of clouds, their attacks shooting like lightning to the barren ground beneath. The mountains shook. Some cracked. The air thundered with the sound of forbidden magic.
The Comet King’s body dropped lifeless to the ground.
But much later in the book we find out that
the Comet King
has not died, but has been hiding under a fake name. What exactly happened in the duel then?