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Greenhouse of Nightmares
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Greenhouse of Nightmares


The natural world is dying and Thymia Scarletscale has had enough. It's time to destroy civilization and pluck the humanoid parasites from the face of this world. And honestly, is she wrong? Will the players succeed in infiltrating Thymia's lair The Verdant Phronstistery and bring an end to her schemes? Or will Thymia & her team of yuan-ti research assistants create an army of monstrous insects to wipe humanoids from the face of the world?

Greenhouse of Nightmares is the first installment in Pretty Little Liches: a trilogy of adventures centered around three unique liches and their lairs designed for high-level play. These three lairs and the surrounding regions can be run independently as individual adventures or tied together into a mini-campaign that centers on the destruction of the Green Hand, an organization of dangerous liches.

A 3-5 hour Dungeons & Dragons 5th Edition adventure for Tier 4 (level 17-20) characters.

This adventure includes:

6 Random Encounters for a Deadly Swamp

Battle Tactics for a 3-Stage Boss Fight

A CR 26 Medusa Lich with New Legendary Actions

7 New Monsters

2 New Magic Items

I hope you enjoy this adventure; please rate & review!

Find me on Twitter @FantasyEcology


Copper - One-page setting guide to the Memorial Mire & 6 additional random encounters.

Silver - Update Pretty Little Liches: An Artifact & A Villain to include an encounter, a skill challenge, and a mini-adventure as a prologue to Greenhouse of Nightmares.

Electrum - Mini-campaign guide to Pretty Little Liches with single paragraph adventures for Tier 4 characters.

Gold - The Green Hand Expanded: Background & Statistics for Rippinck the Deathless, a Bullywug Lich, and inspiration for incorporating him into your campaigns.

Platinum - ???

Adamantine - ???

Pretty Little Liches Trilogy:

Pretty Little Liches Adventure 3 coming in 2020!

Don't forget to check out my other popular adventures:


And if you're looking for monsters, magic items, or other supplements check out my other titles & collaborations:



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Reviews (2)
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February 22nd, 2020
Ran this for my group over on our twitch channel (you can watch the VOD here!) and they had quite a lot of fun! I had to be a bit picky here and there due to some bug phobias, but I was able to keep the horrif [...]
December 17th, 2019
This adventure radiates pulp adventure horror so much you could almost whip it. Zeke told me a little about this adventure before he sent it to me to review, but I had no idea I would be diving into the literal morass and swamp that makes up Greenh [...]
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File Last Updated:
December 13, 2019
This title was added to our catalog on December 13, 2019.