You're a Middle Schooler, So How Did You Kill Your Teacher with a Heal from the Start?

Other people transmigrate thanks to talent. Qin Feng transmigrates by eating arsenic! A toxicology researcher, he brings his unfinished antidote research with him when he transmigrates to a class-change world. The moment he opens his eyes, the spiritual energy of another world gives him stomach cramps. Luckily, arsenic activates the Myriad Poisons Sovereign System, and he becomes a middle schooler with an adorable little sister. The Awakening Ceremony becomes his moment in the spotlight. While everyone else scrambles for combat-class professions, he awakens as a ninth-tier Spirit Healer, with twin poison arts to boot! But who could have guessed this healer is actually a lethal weapon hiding behind a healer’s guise? The Hymn of Life can heal or poison. One dose is all it takes: seventh-tier blade fighter Zhao Lei is caught bouncing between a poison attack and a healing spell. When fourth-turn warrior Zhang Wei provokes him, Qin Feng casually releases a cloud of poison, scaring Zhang Wei into backing down on the spot.