Honestly, one of the coolest things about reading 'Record of Ragnarok' is how it turns historical legend into literal battlefield powers, and Qin Shi Huang is a great example of that. In the series he doesn't suddenly sprout godlike strength because of a single magic potion — his abilities are built from three core things: his absolute will, the legacy of the people and projects he created, and the way the Valkyries arm the human champions.
Visually and narratively, Qin’s power is tied to the Terracotta Army and the massive projects he ordered as emperor. The manga shows him using those soldiers and constructs as extensions of his command; they feel like an expression of his control over life, labor, and death. On top of that, Valkyries (like Brunhilde and the others) turn into weapons for human fighters in these fights, and Qin uses that kind of conceptual reinforcement — weapons, strategy, and the embodiment of his historical might — to fight on par with gods.
If you watch closely, his techniques are presented as a blend of tactical genius, psychological dominance, and the uncanny animation of his minions. It's less a single flashy power move and more the realization of his identity as the First Emperor: he weaponizes scale and obedience. That thematic tie — power coming from legacy and mass will — makes his scenes feel chilling and memorable rather than just flashy.