I ! I'm the strongest forbidden spellcaster in history

Ye Lin transmigrated into a world overrun by demons and monsters. On the day of his class transfer, he became an SSS-rank Forbidden Spellcasterand was immediately met with ridicule. Why? Because casting forbidden spells costs lifespan, and most Forbidden Spellcasters die young. But only Ye Lin knows: with his immortal body, the profession's fatal flaw means nothing to him. When Ye Lin casually unleashed hundreds of forbidden spells in a single move, everyone around him was terrified. "How many lives do you have?!" "You're using forbidden spells like normal attacks?!"