So today I figured I`d go over the Demonic Sword of Zariche, since it dropped while I was levelling my wolf pet and I got a nice screenshot of what happens when it drops.
Anyway, the Demonic Sword of Zariche (Zariche now) is a sword that has a chance to drop off of any mob in the game, and when it does drop the world turns red and the ground shakes. The person who gets it is automatically kicked from any party that he or she may be in and their name goes red*, so it pretty much becomes a free for all for anyone to take the sword. Some heroes will even pay big bucks for it (50mil+). With every person and every mob you kill with it, it grows stronger, as if being able to solo Raid Bosses with it isn`t strong enough! However every kill also shortens the time it will stay. When teh sword drops people immediately go out to find who got it and to kill them and get it for themselves, but it can be a bit hard since the sword fully restores your HP, MP, and dramatically boosts you CP**. Also if you get killed by the person weilding the sword, you don`t lose any exp.
The world turns read when the sword drops O.O
What makes the sword truely unique is that there`s only one on the entire server at any given time. I hear in Interlude (the patching coming out April 11) they`re adding another one, so that there may be two at any given time. Fun!
(*In L2, if your name goes red it means anyone can kill you without getting any penalties or flagging.)
(**CP is like phalanx/stoneskin in FFXI but only works for PvP. When a player hits you for 80 dmg, instead of taking 80 HP dmg, you take 80 CP dmg.)