Heh - not Nightfall but...
The war between the nine major gods and all but one of the titans is not ancient and mythic history, but recent enough that some dwarfs and most elfs can remember it.
The titan's passing was not an easy one - the battles left the lands ravaged, scarred and broken. A sea was stained with a titan's blood, from its waters rise monsters. A mountain chain is formed by the teeth of an always hungry titan, the creatures that descend from their heights, and from the hills beneath share their creators endless hunger. A swamp is fouled with the sundered pieces of a titan's body, the dreaded serpent people and other ophidean horrors lurk there, and cannibals with sharpened teeth. And the titans did not die alone - some of the gods that perished leave not even their names behind. One Titan only truly died, and even that leaves some doubt. One titan only took up the banner of the gods, she is the world, sustainer of life, bringer of death, the everturning wheel.
Nor was the titan's passing forever - they can and will return in the fullness of time. Some have already begun the long journey back to the world where they were cast down. And they will have vengeance.
The Auld Grump