Ultima and Omega Weapon:

[FFIX Choco Boy]

Another way to get Break Damage Limit is killing Nemesis, and if a weapon drops, BDL will ALWAYS be on it, and it will have 3 slots usually, but on rare occasions, it will have 4 slots.

Chances are if you can kill Nemesis you already have a break damage limit weapon. I can't imagine sitting through all of his HP without one.

Actually, when I started killing Nemesis, I only had Nirvana, Godhand, and Excalibur for Tidus(name of his 4 slot customized BDL sword), so I battled him for the other 4 weapons. I only got Kimahri's in this fashion though, for the others I earned/created out of boredom.