-manga Drawing Saikyou Mangaka Wa Oekaki Skill De Isekai Musou Suru Chapter 140- Portable -

The rules (as hinted by the magazine preview):

Unlike typical Isekai heroes who rely on swords or magic, Shinobu’s power scales directly with his artistic ability. A quick sketch summons a temporary weapon; a fully rendered, detailed illustration can manifest a legendary beast or a complex trap. The series balances shonen action with genuine insights into manga creation. The rules (as hinted by the magazine preview):

Unlike other heroes who wave a wand, Yuki’s power tires him mentally. Chapter 140 shows him suffering from "Drawing Fatigue" after the duel, trembling hands and blurred vision. This grounds the fantasy in the real-world struggle of mangaka: burnout. a fully rendered