The objective is to provide a pseudo-forageable item that can be collected by new players and which would be mostly unusable for new players but can be sold to higher-tier players.
To deter botting shrooms are spawned as an event. Event is triggered when crossing from grassland type biome to forest type biome. This is a crossbred of Monster in the Cellar and New Land events. Upon the event a group of 1-10 shrooms would be spawned within sight range (similar to truffles). The event shall provide small amount of xp (25-50). Shrooms shall be capped by survival as usual but should have no or minimum per*exp requirements. Instead per*exp shall affect chances of triggering the event, but the nominal value shall be low, around 400-500.
The shrooms can be eaten fresh or can be dried on a herbalist table before eating eaten. Dried shrooms are significantly stronger than fresh. Eating shrooms cause hallucinations, similar to opium. At the same time the buff decreases all base stats possibly down to 50% actual value (at 100% buff) and shortens the FEP bar respectively. Being under the buff may cause spawning aggressive ghosts, visible to the affected player only. The strength of ghosts and frequency of spawning will increase with buff intensity. Higher q of dried shrooms will reduce stats more. Going above 50% buff should be a high-risk experience.
This is probably, a nasty noob trap, though I'd argue eating random shrooms in a forest is not the wisest thing to do. Numbers shall be balanced that eating one shroom at q10 would give no more than 5% stat decrease and miniscule chance of spawning anything.
The original idea was to use Amanita muscaria as the model shroom but since these are already used as Royal Toadstools, the second choice is Psilocybe semilanceata
As to why such item is needed refer to other threads, e.g. :
viewtopic.php?f=40&t=65833&start=30#p833675
viewtopic.php?f=42&t=65161&#p825238
Edit: ghost strength should relative to character stats, otherwise it would become a joke at higher stats.