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Ythryn Expanded Tower of Transmutation - maps and extra content for Rime of the FrostmaidenClick to magnify

Ythryn Expanded Tower of Transmutation - maps and extra content for Rime of the Frostmaiden



The Tower of Transmutation was one of eight towers of magic in the ancient floating Netherese city of Ythryn. Now the tower, along with the city, lies trapped in a frozen tomb. The wizards of this great tower are either long dead or have lost their minds to madness. Yet the tower still holds powerful magic waiting to be tapped.

This supplement is one of several short expansions to the locations in Ythryn with the following objectives:

  • Expand on the Eight Arcane Towers, making each one its own mini-dungeon adventure with exciting challenges and clear direction for the DM.
  • Provide Detailed Maps, for an immersive experience in person or on a virtual tabletop, rather than a brief 'theatre-of-mind' scene.

This supplement presents the events that occur in the Tower of Transmutation as an alternate to those described on page 257 of Icewind Dale: Rime of the Frostmaiden. As always, it is up to you how much of the content you want to use. It's perfectly fine to use some parts of this supplement while discarding others, or simply let the ideas presented here inspire new ideas of your own. This supplement assumes a party of 4–6 characters of 9–11th level. 

Adventure Summary: 

The party will be able to enter the Tower of Transmutation through a hole on the second floor. After they enter the tower, the party will find a strange device capable of creating magen servants. Next, the party will encounter a strange puzzle that requires pushing a pressure plate on the ceiling of the tower. Once the plate is pushed, the party will be able to access a secret vault beneath the floor of the tower, which contains a plaque on which the eighth line of the Rite of the Arcane Octad is written. The party may search the upper floors of the tower if they are in need of resources to help them push the pressure plate on the ceiling, or if they are unsure of what to do next. In the upper floors, the party may discover helpful magic items or a sentient candelabra named Luminous. 

Check Out Rogue Watson's Full Written Review or Video Review (Transmutation at 32:48)!




Save 25% When Buying all Eight Towers! 

Adventure Bundle

See previews for the other towers below.

Abjuration Conjuration Divination Necromancy Evocation Illusion Enchantment Transmutation

Rime of the Frostmaiden Adventure Bundle

Check out my other content for Icewind Dale: Rime of the Frostmaiden.

Adventure Bundle Evermelt

Tomb of Annihilation Complete DM's Bundle

Check out my other content for Tomb of Annihilation in a complete bundle.

Tomb of Annihilation Complete DM's Bundle

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Reviews (2)
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March 20th, 2023
Another solid adventure, good puzzle, I really appreciate the side view of the tower. With this my party finished up their experience in the towers of Ythryn and had a great time doing it! [...]
April 4th, 2021
I really enjoyed the entire expanded tower series -- I keep recommending them to anyone who runs Chapter 7. Ythryn deserves lots of extra love. This one is unique and a tad silly but you can make the silliness more of a minor in-joke and less ov [...]
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File Last Updated:
October 13, 2022
This title was added to our catalog on March 06, 2021.