I was thinking about this, mostly inspired by Morrowind, but I do think it could be interesting to put a few temporary abnormal ingame character changes into PS.
In morrowind they have two, namely vampire and werewolf but some originality would be appreciated in this game so I don\'t think we should use those directly. The werewolf one can be easily adapted to work with PS though I think.
Lets assume we create a wererat phenomenon, this means that if a character is succesfully hit by a rat it has a very small chance of becoming a wererat. This character would then turn into a rat at night, hereby losing all capability to speak or understand others (they can\'t use the chat interface). They also can\'t equip anything and can be attacked by PC\'s or NPC\'s like guards without warning. In return they can also attack those characters without having to challenge them.
Of course this whole scenario shouldn\'t have rats as a trigger but instead some stronger and much rarer creature, I just used rats because everybody knows them

Another anomaly could have a different trigger, instead of being attacked by a creature you could for example have been too close to \'the big crystal in the sky\' that plays the role of sun in the Yliakum. Touching that crystal might trigger your body to transform into an energetic entity. I \'m imagining something in the form of a floating crystal core (vaguely resembling a humanoid form) surrounded by smokelike energy. This creature would then again loose the ability to communicate and equip/use items. It would still be able to use magic though and be nearly invunerable to weapons, though very vunerable to other magic. It can also float/fly freely throughout the world but can\'t go under water and live to tell.
Any anomalies should however be very limited in existance and power. The limitation in power is easily created by making the chat interface disappear whenever they are in their anomaly state, thus giving those characters no means of communication with others. And they will be seen as monsters by the rest of the gamers. Another drawback would be the characters can\'t level up anymore during their anomaly state.
A limitation in existance is created by making the triggers for them very rare and/or hard to find and also make the whole change not permanent. The first thing that comes to mind here is the moment you die, you go to the death realm and then reincarnate back into Yliakum like nothing ever happened. Seeing that any player can attack you this will make sure there won\'t be an overdose of anomalies.
P.S. I know there are threads like this one already but the ones I saw were turned into discussions about RPing. I don\'t have anything against RPing, in the contrary, but what I \'m proposing is an RP scenario built in the game. This makes sure you have no choice but to go with it and also gives you something to RP with. Because RPing that I \'m a werewolf is all good and well but if I never change into a wolf it kinda spoils the fun after a while.
If this idea gets enough positive feedback I can think up several more anomalies and work them out into much greater detail.