The Weakest Necromancer? From the Start, I Fused an Undying Bone Dragon

【Enlistment + No Academy Arc + Necromancer with Unlimited Merging】 After transmigrating to a world where everyone changed classes, Wu Tian became the adopted son of the Lin family, a financial dynasty. When the biological heir returned, Wu Tian lost everything. Then, on the day of his class change, his family schemed against him, and he awakened the weakest class of all, one even dogs wouldn't play: Necromancer! Because summoned undead could easily be seduced into betraying their masters by abyssal monsters, Necromancers were branded “traitor-to-humanity material.” Wu Tian was sent straight to the battlefield as cannon fodder! However, aboard the prison wagon bound for the border, Wu Tian awakened the 【Undead Unlimited Merging System】! Not only could he merge undead without limit, but every undead was soul-bound to him and absolutely loyal! Merge two skeletons to create an 【Elite Bone Warrior】! Merge ten thousand skeletons to create an 【Immortal Bone Dragon】! While the young master of the Lin family was still under his clan's protection, congratulating himself for reaching level 20, Wu Tian was already seated upon a bone throne, with an army of hundreds of billions of mythic undead behind him, making the entire Abyss tremble beneath their iron hooves!