MTL - Offered Into Marriage - Chapter 49 Prodigal leopard

A serious accident caused the protagonist’s brain to have an unusual mutation. This changed the brain development that it opened the door to a mysterious universe. Not only he obtained a ‘god-like’ powerful telekinetic control and mental perception, he also had an abnormal analysis and memory capability comparable to super computer. Having such super brain, his rough life began.

Brain development progress 10%…….20%……50%….80%…. …100%

- Description from Novelupdates

Yang Yan found himself becoming a corpse. But before he could stay for a minute, the lid of his coffin was opened.A stunning face appeared in front of him.Leng Biyue!As the Holy Maiden of the Fairy Maiden Sect, she possessed the quasi-empire bloodline!Blood spilled from the corner of her mouth, fell, and landed on Yang Yan's face.His eyes opened!“The Sword Dao Emperor, who was buried for 100,000 years, has come to life once again!”

I was reincarnated into another world, and I’ve brought the Horadric Cube from Diablo II with me.
Being a knight is cool and all, but being a wizard is pretty neat as well.
So, which one will it be?

As a virtuous wife, does it include tolerating his cousin, enduring his concubines, bearing his mother?