Wo! Shishang Zui Qiang Jin Zhou Shi

A man named Ye Lin is sent to a world dominated by demons. On the day he is promoted in his class, he is assigned the rank of SSS-level Forbidden Spell Mage, a position that causes others to mock him. This is due to the nature of forbidden spells, which drain the caster's life. Despite being the most powerful class, it is also deadly. Unbeknownst to others, Ye Lin is immortal, making the class's danger irrelevant to him. When he uses numerous forbidden spells simultaneously without consequence, others are shocked. They question how many lives he possesses and whether he uses high-level spells as basic attacks.