One time during Nostalgia (when I was a newbie,) I had a lightning crystal, and one of these bronze zaghnals. I was a Red Mage, (I still am, Lv. 51 now!) and could not equip it. (Back then I didn't know to check the level/job thingies before buying. I just thought it looked cool so I bought it, wanting to use it.) I got bored while riding the ferry from Mhaura to Selbina, so synthed using a Lightning Crystal and the bronze zaghnal. The crystal broke, so I have no idea what it makes.
i Reccomend all people level 1-10 buy this weapon, it dramatically increases your attack power, and youll be able to beat orcs at level 3! *only orcish fodders though :p* but you get very good EXP ^^