I Changed Class to Rune Mage, So Why Am I Tattooing the Nine Dragons Pulling a Coffin?

It's the Age of Class Changes, and games have merged with reality. After transmigrating into this world, Shen Qinghe awakens S-rank mental power, yet changes into a universally derided dead-end class: Rune Mage. No skill books? No rune tablets? Reduced to being a human flashlight? The whole internet mocks him, and the guilds turn him away. Shen Qinghe just smiles. Because he's awakened the [Chinese Compendium of Ten Thousand Runes] System! The runes others desperately search for are the five thousand years of Chinese civilization passed down in his mind! He uses his body as paper and his soul as ink, inscribing myths upon himself! He carves [Sanxingdui · Vertical Eyes] between his brows, seeing through illusions and weaknesses at a glance, and staring straight at the gods! He gathers [Oracle Bone Script · Fire] in his left palm. With a casual stroke in the air, Zhurong's flames incinerate the eight wilds! He tattoos [Warrior Saint · Guan Yunchang] on his right arm. One glance from those phoenix eyes, and the Green Dragon Crescent Blade cleaves a dragon in two! He engraves [Kuafu · Chasing the Sun] on his legs, shrinking distances until his speed surpasses light itself! When the Abyssal Demon God descends and the world falls into despair, Shen Qinghe stands bare-chested, and the [Nine Dragons Hauling a Coffin] tattoo across his back seems to come alive. Nine black dragons burst from his skin, pulling a bronze coffin that suppresses the ages! A Saint-ranked powerhouse: “I demand an investigation! He's cheating! What kind of mage is more brutal in melee than a warrior and stronger at range than a forbidden spell?” Shen Qinghe: “Sorry. Chinese runes just don't play fair.”