Final Silver Fire

The witch who fell off a cliff and was on the verge of death was destined to merge with the lonely tentacle monster in the void. When the Pure White Witch inhabits the Evil God of Chaos, the gears of fate begin to turn, and the tiny Mars will eventually sweep across the entire continent. (Introduction cannot move to the main text) Medieval fantasy continent, traditional Western fantasy, no time travel, no system, dual male and female protagonists, single female protagonist, tentacle monsters