I’ve been trying to think of settings that I can flesh out later as full adventures or cool places of interest. The Halls of Glass are probably one of my favorites–nothing quite like an ancient library of magical illusions.

Illusions and Elusions is a standalone encounter designed for five characters between levels 8 to 10.

The Halls of Glass, a mysterious academy for powerful illusionists, holds many secrets found in—and outside of—reality. Its corridors are lined with mirrors, magic, and tricks, all waiting for those curious enough to try and unravel the layers of deception found in each mirage, apparition, and trick of the mind. As its masters would warn: be on your guard, for seeming means nothing—and nothing is as it seems.

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