Last but not least, replacement dolls, when you die (small chance when you're white, high chance when you're red, ie have been pking) you can drop items, a replacement doll prevents you from dropping items. These become necessary at high lvl, because the pking becomes a little more common, and you actually have stuff that you really wouldn't want to lose. I lost crafting mats while I was white, fighting a quest boss. At one point, my guild was in a all out PK war with another guild, and while I didn't attack anyone that was white (only attacked members of the other guild that had already pked) and only died about 3 times, I lost 200k worth of items. I wasn't the worst off though, someone from the other guild dropped their cash shop butterfly wings. Because of these items, cash shop items become as necessary (well, actually more so) as pots.