Catalyst Weapons

The Six Catalyst Weapons are similar to the Devil's Arms in Tales of Symphonia. They're used in the sidequest in fighting Nebilim (Gelda) in Tales of the Abyss. They are also called 'Catalysts'.

Weapons
Nebilim You get Nebilim when you fight the Rex Blade in Meggiora Highlands 1. It is equipped by Luke.

Lost Celesti Lost Celesti is equipped by Guy. It can be obtained when you get the flight stone back to Daath, talk to Maestro Tritheim then Nephry in Keterburg and finally Peony in Grand Chokmah. Blood Pain You obtain Blood Pain you must talk to Elder McGovern then talk to Glen in the inn, find Elder McGovern's rappig and talk to Glen again, then he will give you Blood Pain. This catalyst is equipped by Jade. Holy Quelquatl Equipped by Natalia, Holy Quelquatl is found in the Abandoned Factory in Baticul. But you must have Meiu Wings and Meiu Fire 2.

Heart of Chaos Heart of Chaos is equipped by Anise. You obtain Heart of Chaos in Daath Cathedral but first you have to play hide-and-seek with Florian as he was the one who found the Catalyst while clearing Ion's belongings. After you find Florian, talk to Trithiem to ask if you can borrow it. Heart of Chaos was originally Fon Master Evanos'.