What is reality but yet another dream?
Whilst the aforementioned liquid secreted by erythisblumen is incredibly dangerous, it remains the secondary danger to using an erythis flower. Breathing directly from the flower itself triggers an emission of the flower's addictive pollen, inducing sleep with extreme haste. This sleep does cure the deadly stimulant effect caused by the consumption of its liquid, but at a far greater cost than initially apparent.
If the affected is able to wake up from their dreams, they will forever find reality to be a pale imitation of the dream the erythis crafted for them. The attractions of everyday life, both physical and mental, will cause them to only wish they could draw further breaths of the erythis. Should they be granted this 'blessing', they will return to the same dream that they once awakened from to continue living a second life in paradise. Even if they are only ever granted one opportunity to fall under an erythis flower's effect, the mental stain will never truly fade - not even powerful spells such as Break Enchantment or Remove Curse can cure the longing, though enchantment spells are effective in swaying attention to other subjects for a short time.
When these fantasy-creating properties were initially discovered, it was presumed that the erythisblumen would be effective at curing depressive states by rekindling a love for life. The first testers of the flower did indeed show a marked increase in happiness. But with each opportunity to enter an erythis flower's dream, their ability to wake up decreased. Their dreams began to last for days upon end, extending to weeks in those with stronger fortitude. The afflicted showed no desire to eat or drink, instead wishing for more of the flower's kiss. Where allowed, they simply never woke up. Resurrection magic was functional on their bodies, but their souls were resistant to returning.
Curiously, the effect seems most impactful on those with magical ability. This has not been tested extensively, however.
This has not deterred the Gothadruni from experimenting further with the erythisblumen. Single petals and captured samples of pollen, whilst still possessing addictive and dream-altering properties, pale in comparison to the effects caused by the flower in full. Powerful sleep-assisting potions have been crafted from the erythis, and equally powerful healing potions produced from extremely diluted amounts of its liquid. The flower in full is rarely permitted to be used in recent days - though it has been requested and provisioned, under guidance, as an end-of-life care measure for certain important patients. It does, after all, enable a peaceful and painless death.
It is the effect of the erythis upon undead creatures that should, perhaps, be most concerning. The flower itself has little effect, but its secretions function as a potent accelerant even on the undead, with its regenerative properties functioning as a fast way of repairing the damage left by time. This has seen
Glühenwald be the host to liches and other undead fiends in the past as the intelligent undead seek methods of repairing their lost vanity.
When combined with
Mountain Dreambloom, however, the liquid becomes a fantastic method of combating the undead: the dreambloom's healing effect combined with the erythis secretion's stimulant provides the forces of Light with a tireless method of fighting their untiring foes, and the resulting potion functions as an acid when introduced to undead flesh. The petals of an erythis and a dreambloom, alternatively, create a highly addictive but extremely potent sleeping aid that provides its consumers with a healing sleep.
Breathe deeply. Drink of the sweet scent, and abandon that which harms you to the vulgarities of flesh.
Tristan Snaer
Wow! What a really fleshed-out article! Very little I can find to critique you on this, so instead I'm just going to mention how I really enjoy the incorporation of other elements and their behavior with the living daydream, like the undead and how it's favorable for them! Then you also state a counteraction to it with the Mountain Dreambloom which adds so much flavor to the world's context! Nice job!
https://www.worldanvil.com/w/camelot--comics--tristan-snaer
~ Tristan