So yh kill until you get i. if you kill the boss, you have a little change of getting the armor ( so 13 times won't be enough i guess). Or you drop only a item to create it, but then there would be something about refining. So think the first one. probably there is no % in drop, just about luck. it will take more time to get it. everyone will pking you while farming bosses. So Webzen wins again... i'm out