Obizzo grand-son, Corrado, called “l'Antico” (“the Old Man”), sung by Dante in the Purgatory, Song VIII, is a major figure in the history of the Malaspina family.

Indeed, in 1221, together with his cousin Obizzino, he undertook the sharing of their grand-father's immense estate. Corrado eventually became the head of the Spino Secco and he got the territories located on the right bank in Magra valley in Lunigiane, as well as the fiefs of Aveto, Trebbia and Borbera valleys. Mulazzo became the main city of this vast territory and Corrado kept his family's emblem of the Spino Secco.