How I Reincarnated as an Idiot

The Protagonist Becomes a Nonhuman Being and Gets Found Out

Something like turning into an undead creature, an animal, or a supernatural being. The protagonist uses their strong humanity to suppress their instincts and keeps growing stronger. Nothing too meme-heavy, please. I'd prefer vivid, descriptive writing and tight storytelling.

Looking for Novels Where the Protagonist Only Evolves, Never Takes Human Form, and Has No Female Lead

Like "The Cellar World Turned Me Into a Mutant Beast, Shocking All of Humanity". Please!!!!!

The Protagonist Isn't Human, Never Takes Human Form, No Romance, No Ambiguous Relationships

The protagonist shouldn't be human, there should be no romance or love interest, and they shouldn't take human form or meddle in other people's business. They should be decisive, like "Evolution Begins with a Big Tree".

Novels Where the Protagonist Is a Weapon That Everyone Fights Over

Any Books Where the Protagonist Turns Into a Weapon? Please!

They can turn into anything, as long as it's a weapon. Books, swords, knives, spears, anything goes.