I have been looking for a specific novel that I can't remember the name of if someone can help me find it. The details I remember of the novel are that the main character is male. And that humanity alongside other species have been tossed into a death match of sorts. The story starts with Mc being middle aged and humanity is on its last legs when the Mc dies he travels back in time to when he first got summoned to this world (they were sent in waves) the starting level he spawned on was if I remember correctly a bunch of skyscrapers that are connected via bridges and you must travel by these bridges because on the ground level there are these tall black creatures that will tear you to shreds at one point they go to kill a specific golden version of this creature (there are multiple golden ones) the MC masquerades as a member of this powerful organization for most of the first act I think they called themselves angels or something but they always kept themselves masked. That's about all I cam remember of it other than some small details. If this sounds familiar to anyone and if you know the name it would be most appreciated.
I'm looking for a specific novel
