Youngest Scion of the Mages

It was a ridiculous piece of fiction, one that I’d be ashamed to call a novel. Yet, that was exactly what I was transmigrated into.
Larsen Mayton.
I became that supporting character, a wretched scoundrel who got purged at the age of 17.
Now, as the writer and creator, I shall reshape the world of the character Larsen Mayton