I Become a God by Eating Monsters

This is a cruel world. If you don't grow stronger, you die. After a little pure-white spider stole some of Spider Second Brother's snacks, her mental power increased, and she began to think independently. In the world of monsters, that's an astonishing feat. Apart from dragons, all monsters are unintelligent, so this thinking spider set out on the path to becoming the King of Monsters. [Mental power +1] [Mental power converted into intelligence +10] Whitey clutched her head and wailed. “It feels like... like I'm growing a brain.” The monsters she'd eaten: “Not just a brain, you're growing everywhere! We hereby report someone for eating monsters without permission.” Humans: “Could this be the legendary monster... the Pure White Demon Spider!” Whitey: “Why does everyone run away as soon as they see me? Do they think I'm some monster who kills without batting an eye?” The path to power is destined to be bloody. Let's see how Whitey survives in this cruel world and steadily rises to become one of the strong. P.S. No romance, a little ensemble cast, nonhuman perspective, and the protagonist is female. She'll take human form later. Let me stress again: this is a cruel world... Heh heh heh.