The Apocalypse Is Coming, I Suck Zombies and Become a Boss

Everything is possible with mutation I was originally the most useless "medic" in the rescue team, but when the apocalypse came, everyone mutated. My comrades turned into roaring monsters, and I hid behind the ambulance and shivered. Until an SSS-level zombie tore open the car door, and I hurriedly inhaled the black mist it sprayed... There was no pain, no decay, but a cold reminder sounded in my head: "Absorb the core energy of 'Tyrant' and obtain the skill: Power Absorption." I raised my head and licked my lips. It turns out that zombies are my great tonic.