Baka to Test to Shoukanjuu‎ - Volume 12.5, Me, Christmas Eve and the Whirls of Conspiracies (Second Half)

She is a descendant of Shennong with unparalleled medical skills and possesses a unique treasure. He is a handsome warlord who mysteriously goes blind and is sly and cunning. Crossing into another world, she becomes a six-year-old little waste. Through defying the heavens with summons and forbidden magic, she rises up in one fell swoop, showing a dazzling brilliance, looking down upon the powerful.When arrogant meets cunning and genius clashes with monstrosity, at that moment, the world trembles in awe!

The doomsday fell upon the earth when a dragon coffin sealed under a snow mountain for ages shifted, and the civilization of gods and devils began. The whole universe turned into a fantastic new world where everyone could rise to the top through cultivation. A lucky young boy seized the opportunity, and started his journey to be an overlord in cultivation.

- Description from Novelupdates

Liu Yan, an ordinary office worker from Earth, unexpectedly traveled to a strange world.

The heroes of the ages are on the side, embarking on a journey to conquer the heavens.

- Description from novelbuddy