starting as the black dragon boss i am invincible

The game has turned into reality, the era of the changing classes came!Su Yang changed his class and became a simple warrior.But unexpectedly, he discovered that he had turned into the Level 99 Black Dragon Boss as well?The first time he tried to connect with the BOSS, he encountered a level A guild standing in front of him?Facing those class changers who were armed to the teeth, Su Yang casually spewed a mouthful of black fire-[You have wiped out the "Spirit Hunt" guild][Exp gained +990,000, level 1-20 (exp overflow, please change classes as soon as possible][Obtained loot: Diamond Rank: Great Sword Storm's Call, class change scroll]Slowly, the Black Dragon BOSS changed into a level 999 Abyss Lord.Su Yang realized he seemed to be invincible?