Greenhouse Effect Witcher 3: Wild Hunt Quest
Suggested level: 27
Group: Secondary Quests
Location: Kaer Morhen
To start this quest you have to visit a valley in the southeastern part of Kaer Morhen where a strange Weather Anomaly occurs.
It turned out even the area around Kaer Morhen, a place which - one would think - Geralt knows by heart, can hide a great many interesting and undiscovered phenomena. Not far from the keep, Geralt came across an area where the weather differed remarkably from that of its surroundings. He decided to investigate what sort of forces were at work.
Related points of interest
Weather Anomaly
Kaer Morhen
Quest stages of Greenhouse Effect
1. Investigate the weather anomaly using your Witcher Senses.
You can examine three boulders in this area and you will come to the conclusion that they affect the aura of this area.
In the niche you will find a stone that is an illusion. When you use the Eye of Nehaleni, you will find the letter from the resident mage hidden underneath it.
2. Read the mage's letter.
Letter from the resident mage
Lesbeth,
I’m very flattered by your interest in my humble greenhouse and naturally will describe to you how it works. Believe me – I’ve nothing better to do here. The witchers, being witchers, are tight-lipped, and even when they do finally say something it’s rarely anything very interesting. But enough of my complaints, let’s return to the greenhouse.
“Greenhouse” is, of course, merely a term of convenience, for this construction does not require any structure that could be called a house – it consists of three monoliths made of magic-absorbent stone (basalt is best, or porphyry, but granite will do in a pinch). The monoliths must be arranged in a triangle, and then charged with energy from the elements of fire and water.
Since a triangle has three vertices, there is no way to lay out the powers symmetrically – and that is precisely the point. The unstable arrangement will strive towards equilibrium according to the principle of the conservation of magic energy. Heat is a side effect of this process – and so, as they say in Beauclair, voila!, within the triangle conditions become like those of a greenhouse, favorable to the cultivation of exotic plants.
Two last remarks. First, charging all three monoliths with the same element will accomplish nothing – the arrangement will be stable and there will be no flow of energy. Second, the arrangement will naturally lose its charge over time and thus must be checked up on regularly – especially bearing in mind that once equilibrium is achieved, the temperature will fall and heavy precipitation will result, following the ancient principlequod magia facit, natura laxit.
That will have to do for now. Your Hieronymus.
PS. Perhaps by way of thanks you could come visit me? True, the witchers have made me swear on all that is holy not to reveal where Kaer Morhen lies, but you, my dear, dear Lesbeth, can be trusted.
3. Use the obelisks to restore the place's proper microclimate.
To activate the stones, you must hit two of them with the Igni sign and the third with the Aard sign. The order doesn't matter.
4. Kill the chort.
When you activate the stones, a portal will appear from which the chort (27) will come out. Kill it.
5. Return to the site of the anomaly in a few days.
To complete the quest come back here after two or more days and you will see that many herbs have grown here, such as White myrtle petals, Honeysuckle, Wolfsbane, Hornwort, Mandrake root, Ribleaf, Cortinarius, Verbena, Nostrix, Puffball, Balisse fruit, Beggartick blossoms, Fool's parsley leaves, Han fiber, Crow's eye, Ginatia petals, Honeysuckle, Longrube, Pringrape, or Hop umbels.
After a brief investigation, the witcher was able to conclude that the weather anomaly was the doing of one of the resident mages of Kaer Morhen, who had created a sort of outdoor greenhouse in which to cultivate the herbs used for the Trial of the Grasses. Though you might not know this, Geralt is quite the handyman, something which came in handy (pun unintended) at this time. He banged and nudged the broken magical apparatus and returned it to working order in no time. Before long, rare herbs were growing outside Kaer Morhen once again.