Once a wondering rogue named Corigon, of a nomadic Kratork swamp tribe, Curigon and his brother Llyron walked away from their home as they grew into manhood. It wasn't long before they were preyed upon by a plauged clan of Frodrinn in their sleep. The once proud Curigon slipped into madness as his brother's body and mind began to decay. Eventually Curigon became the Terrible Sulgrin, taking his name after a corrupted king, and Llyron became a nameless Apocolyptic monster.