Necromancy Is Useless? I Got a Hidden Golden Trait from the Start!

This is a world where games have become reality and monstrous beasts and demons run rampant! The age of universal class advancement has arrived! Ye Xuan becomes a Necromancer, with just two staggering death soldiers from the start... Just when he'd lost all hope, he discovers he has a hidden golden trait! Every five levels, he can unlock a new golden trait! [Necromantic Overture: Summoned undead have no cooldown!] Death soldiers are useless once they die? Then I'll win with sheer numbers! Carefully exploring dungeons? Sorry, when you've got enough people, you can do whatever you want! [Necromantic Offensive: Undead units gain the ability to self-destruct!] Grinding monsters takes too long? Then I'll drop a giant nuke! Watch that experience bar shoot up! While everyone else is still teaming up to fight monsters one by one, Ye Xuan is already blowing them out of the water. [Necromantic Guard: All damage dealt to the mage is transferred entirely to the undead!] You're supposed to play cautiously in the early game? Why bother? These monsters barely hurt me! Hit me some more! [Necromantic Evolution: Summoned undead undergo a massive evolution!] Even with all those death soldiers, they're still cannon fodder? Then how about necromantic knights, necromantic exterminators, and necromantic wyverns? Some time later, the war between nations begins. Seeing the necromantic wyverns blot out the entire sky, people from other countries are stunned... Ye Xuan: A Necromancer? Call me the Necromantic Calamity!