Dark Wizard: Rise! My undead army

Lynn, terminally ill, never understood why he had been thrown into this cruel alien world. Mother Earth had generously granted him the ability to record and analyze. But faced with a disastrous start—fallen into the clutches of the underworld and on the verge of being sold to the Nightingale Pavilion—Lynn decisively chose to embrace the principle: if you can't beat them, join them. From then on, the Bloody Hands Gang gained a new notorious member, nicknamed "Abacus Snake." He had hoped to use the gang's connections to accumulate his starting capital, but an unexpected turn of events disrupted his plans. What? A wizard? Recruiting apprentices? Great news—could they become noble mages too? What the heck, a dark wizard? Whatever; he was no saint anyway. And so, Lynn successfully joined the Bone Spire Academy and became a glorious dark wizard. Who says there aren't good people in dark wizardry?