He awakens a talent for commanding the undead, but puts his skeleton soldiers on three shifts, gives his vengeful spirits KPI reviews, and provides his liches with full social insurance and housing benefits. The Dark Council mocks him for not understanding the true meaning of an undead calamity, until his undead army starts clocking in and out on time, never falls apart, and sweeps the Council's headquarters with perfect efficiency.
Revision suggestion: Build a system where management ability equals combat strength. Consider establishing that the key to the undead's eternal existence is the fairness of their soul contracts, and that the protagonist inadvertently fulfills the highest form of contract: the Equal Contract.