Trebbe was an archwizard and one of the most prolific spell creators in Netheril.
He was a specialist in magic that protected arcanists, enabling spell duels to last much longer.
Trebbe was born in -2292 DR. He established Shadowtop Borough, a Netherese enclave for magical research in -2267 DR. It was here he created the Crown of Horns, an evil artifact.
In -2237 DR, a spellcasting accident triggered while Trebbe was working on the crown led to his death.