Read Webtoon The Reincarnation of the Forbidden Archmage online in English. Also known as Kinki no Tensei Daimadoushi, Kinki no Tensei Daimadoushi: Munou kara Level Up de Saikyou ni, 禁忌の転生大魔導士 ～無能からレベルアップで最強に～, and 禁忌の転生大魔道士.

When mysterious dungeons appear across the world, people blessed with awakened skills rush inside chasing fortune, fame, and a way to change their lives. Saeki Iori has no skill at all, leaving him branded as useless by those around him. Still, with his younger sister Kotoha suffering from an incurable illness, he chooses the dangerous path of an adventurer to pay for her treatment.

Mocked by skilled party members and pushed into deadly situations, Iori seems like the weakest person in the dungeon. Yet hidden beneath that powerless image is the memory of a past life as a great archmage, along with forbidden magic that can be reclaimed only as he grows stronger.

This series may appeal to readers who enjoy dungeon fantasy, underdog power progression, and reincarnation magic stories.