Starting as a Boss, I Became the Nightmare of the Heavens

[Invincible] [Playing It Safe] He transmigrates to a fantasy world and finds himself the Night God Hall's master, now the boss of a major faction! What's more, as long as he defeats challengers from every corner, he gets all kinds of chances to draw rewards, pulling opportunities from the myriad heavens! But what if the challengers are too strong? [Host, there's no need to worry. As the boss, you enjoy the Night God Hall Boss Aura, receiving an endless boost of demonic power and suppressing all attribute-based powers without exception, including those beyond the Six Realms.] [You also have an endless Blood Spring as a fallback. You are immortal and indestructible, and if you fall, you will immediately revive unconditionally.] What happens when you become the boss from the start and are instantly invincible?