Wastrel Heir of Velmoria : A Regressor Magic School Adventure

The kingdom's last defender had one chance to send his memories back in time. He chose wrong. The Sword Warden of Cravess watched his knights burn alive as Black Mana consumed all that remained of his lands. With his dying breath, he passed on his memories to sixteen years in the past— except with a catch.  He could choose anyone but himself as the recipient of those memories.  His choice? His best friend, Lucan Velmoria. The genius who'd killed a Fourth-Circle Blood Mage as a Second-Circle Journeyman. The prodigy who surpassed every Combat Mage in the academy despite dropping out. The man who'd died saving his life. Except that genius never existed. The real Lucan Velmoria is an outcast drowning in wine, heir to a dukedom he never wanted. His Shadow Mana affinity? Worthless—no one's ever advanced past Second-Circle with it. Those legendary feats? He has no idea how his future self accomplished them. But with his half-sister marked for assassination, his mother trapped in endless sleep, and the Duchess' endless machinations, he must embrace the impossible techniques in his inherited memories and prevent his kingdom's annihilation. He has sixteen years to rewrite the ending.