Undead Lord: My Followers Can Evolve Without Limit

[Vast worldbuilding + complete setting + undead lord + somewhat dark + genetic technology + multiple heroines + slow burn] Blue Star has become a prison in an evolutionary paradise, and I have become the gravedigger of every civilization! The undead never die, and genes ascend! The Holy Grace Church carves open human wombs with thorny crosses, so I’ll use their angel genes to modify skeletons! The dragons breathe fire and scorch the earth, so I’ll use their bones to recruit bone dragons! Abyssal monsters tear through dimensions? The Death Knight’s scythe has already reaped the heads of demon gods! “Extraordinary genes detected. Fuse them?” “Yes! Give the cursed warriors the wings of curse crows, and let the bone arrows of lava archers set the divine kingdom ablaze!” Now, those who rule civilizations finally understand: **The Eden they created is nothing more than my gene incubator!** Much later, Ying Che finally discovered that the Key of Evolution could do far more than fuse genes... Could it evolve heroes, purify bloodlines, create special buildings, and even strip the Holy Grace Church’s pantheon bare to establish a new church?