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Robert BlezardRidley Freeborn, Knight of Izmer from the Mystara Message Board posted 14 February 2007.
Marina of Pretensa, Royal Wizard of Sumdall, Head Mistress of the Magic School of Izmer from the Mystara Message Board posted 14 February 2007.
Cover Mock-ups for D&D 4th Edition Mystara from The Piazza posted 27 January 2011.
Knightfall's Mystara, two versions of the main map for The World Unknown; and updated sundered Thyatis from the Mystara Facebook group posted 30 November 2016.
Giant; Horse, new creature from The Piazza posted 10 January 2017.
Howler Wasp, new creature from The Piazza posted 10 January 2017.
Umbral/The Veil of Shadows (Multiverse Dimension) from The Piazza posted 12 January 2017.
Compiled 3E Monster List by Type/Subtype from The Piazza posted 13 January 2017.
History of Western Davania from The Piazza posted 1 May 2018.
The World Unknown, final hex map from the Mystara Facebook group posted 7 May 2018.