[quote]I used it allot to get the catalist done but it was buged so i stored it in the vaulth, then Bungie changed something and when i checked it out my catalist progress was done without me using it. That reminds me that i have to take it out again and use it.[/quote] I'm guessing bungie changed the catalyst to where it's 500 kills instead of 50 perfect 5th and I think around 200-300 kills previously, don't know when this was changed either. And I think I might give it try sometime too, a friend used it with anti barrier back in beyond light, and it seemed like a great add clear and boss dps with perfect 5th... There were old methods using leviathan and even a group of cabal in another part of edz, shooting perfect fifth at the phalanx's shield weakpoint/middle, the method is probably still up on YT. Originally tried the phalanx method and I got an extra 2, to where I was 3/50 progress, and personally it wasn't too efficient, then I found the method mentioned in my post and completed the 5th kills in like 30-40 or so minutes.