The Magician Who Was Constantly Called Incompetent Is Actually the Strongest in the World, but Was Imprisoned and Didn’t Realize It Volume 4 Afterword

 Here's the link for reading volume 4 Afterword

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ToC

T/N: This completes volume 4! And if anyone isn't aware the same author's other series we are currently translating as well. Check it out by link here. Volume 2 of it is scheduled to release on September 24.