Phantom Hunter

After a bizarre parasitic force latches onto him, a boy kills his abusive master and sets off to become the most feared supernatural hunter in a world crawling with dark entities. That's your first episode, and the tone only gets heavier from there. Bai Gui Ri Xing is a Chinese ONA that drops you into a grim fantasy setting where the line between monster and human barely exists. The protagonist's transformation gives him bizarre, unsettling powers, but society treats him like just another thing to be afraid of. So you've got this kid who's essentially weaponized trauma — hunting the supernatural not because he's some noble hero, but because it's the only thing his new body is good for. The isolation and identity crisis hit harder than you'd expect from something this action-heavy. Yien Animation Studio does something interesting with the visuals, mixing traditional Eastern aesthetics with a more modern, fluid style that fits the dark atmosphere. The power system draws from Eastern mysticism, which gives the fights a different flavor than your standard shonen abilities. The soundtrack leans into the bleakness too, really letting the mood breathe. If you've been into stuff like Thunderbolt Fantasy or Bloody Romance — that darker Chinese fantasy vibe with high-stakes action and morally grey characters — this scratches a similar itch. It's brooding, it's violent, and the protagonist's descent toward becoming a so-called "Mad Killing God" gives you a sense that this story isn't pulling its punches on consequences.