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John Calvin
Post Blackmoorian Character Class: Cyborg from the Mystara Mailing List 07 March 1999.
Blackmoor: Post Cataclysm from the Mystara Mailing List 11 March 1999.
Nithian Outposts from the Mystara Mailing List posted 26 March 1999.
The Alphatian Arts from the Mystara Mailing List posted 15 September 1999.
Hollow Moon Spells from the Mystara Mailing List 22 November 1999.
Enclave Timeline - Hidden Blackmoor from the Mystara Mailing List 29 November 1999.
Not Men, revised from the Mystara Mailing List 29 November 1999.
Thonian Gremlinate, Anti-Tech spells from the Mystara Mailing List 03 December 1999.
Catastrophe Myths from the Mystara Mailing List 10 January 2000.
Zen-Thara - Hidden Blackmoor from the Mystara Mailing List 13 January 2000.
Shadow Elves 3000 AC from the Mystara Mailing List 08 September 2000.
Notes to Dragon Society in Wyrmsteeth continued from the Mystara Mailing List 10 September 2000. (done with Giulio Caroletti)
Organisations in the Wyrmsteeth continued from the Mystara Mailing List 10 September 2000. (done with Giulio Caroletti)
The Known World 3000 AC from the Mystara Mailing List 11 September 2000.
Wyrmsinger, a prestige class for the Wyrmsteeth from the Mystara Mailing List posted 25 September 2000.
Corruption of the Swords from the Mystara Mailing List posted 22 August 2001 to 12 October 2001. (done with Max Monas and Jens "the Stalker" Schnabel)
A Treatise on Lycanthropy from the Mystara Mailing List 09 November 2001.
Alter Personal Climate from the Mystara Mailing List posted 26 November 2002.
Rafiel's Home Plane, revised from the Mystara Mailing List 09 March 2003.
Planar Warfare from the Mystara Mailing List 08 July 2003.
Lhondaras: Terra, Djaea and Ordana's homeplane from the Mystara Mailing List 29 July 2003.
The Eternal City: Khoronus's homeplane from the Mystara Mailing List 26 August 2003.
Campaigns through Time from the Mystara Mailing List 04 September 2003.
Imperialism and Conquest a tentative guideline to BC 1000 from the Mystara Mailing List 08 September 2003.
BC 500 plotlines from the Mystara Mailing List 16 September 2003.
Exiles Campaign from the Mystara Mailing List 10 January 2004.
Mystara related crystal spheres from the Mystara Mailing List 12 January 2004.
Mystara - Eberron crossover from the Mystara Mailing List 23 June 2004.
The Nucleus of the Spheres as a Touchstone from the Mystara Message Board 08 August 2004.
Hytiliaph from the Mystara Message Board 11 September 2004.
The Radiance Revisited from the Mystara Message Board 12 September 2004.
Adventure ideas - Working Against Hytiliaph from the Mystara Message Board 13 September 2004.
Hytiliaph's Mountain - Ancepes Trigeminus from the Mystara Message Board 13 September 2004.
Hytiliaph's Mountain - Secundancepes from the Mystara Message Board 02 October 2004.
Adventures on Secundancepes from the Mystara Message Board 10 October 2004.
Beyond Ancepes Trigeminus: the Fey Court from the Mystara Message Board 19 October 2004.
Frostburn in Mystara from the Mystara Message Board 19 October 2004.
Frostburn campaigns in Mystara from the Mystara Message Board 21 October 2004.
Mystaran libraries from the Mystara Mailing List 03 November 2004.
The Other Doomsday Device from the Mystara Message Board 30 July 2005.
Hytiliaph - Heredity table from the Mystara Message Board 16 July 2007.
Yuri Molotov from the Mystara Message Board posted 21 October 2007.
Gunzuth - Hin Death Knight from the Mystara Message Board posted 23 October 2007.
Crests of the House of Ritterburg from The Piazza 26 July 2008.
Crests of the Clan of Alhambra from The Piazza 03 August 2008.
Crests of the Clan of Erewan from The Piazza 03 August 2008.
Crests of the The Kingdom of Alfheim (1000AC) from The Piazza 27 August 2008.
Crests of the The Grand Ducky of Karameikos (1000AC) from The Piazza 29 August 2008.
Mapping around Threshold from The Piazza 04 September 2008.
Mystaran Archaeology - Tools of the Trade from The Piazza 06 January 2009.
Tropos from The Piazza 22 January 2009.
Mystaran Villain Challenge from The Piazza 01 February 2009.
Crests of the Goblinoid Tribes of Karameikos from The Piazza 02 February 2009.
Adapting Curse of the Crimson Throne Adventure Path to Mystara from The Piazza 09 February 2009.
The Shimmering Lands - Government from The Piazza 23 February 2009.
The Shimmering Lands - Immortals from The Piazza 24 February 2009.
The Shimmering Lands - Faiths from The Piazza 25 February 2009.
The Shimmering Lands - Map from The Piazza 26 February 2009.
The Shimmering Lands - Tales from The Piazza 27 February 2009.
The Shimmering Lands - NPCs from The Piazza 27 February 2009.
The Shimmering Lands - Map with city placements from The Piazza 02 March 2009.
Map of Mogreth from The Piazza 03 March 2009.
The Shimmering Lands - Caste System from The Piazza 04 March 2009.
A Day in the Life of Kerghyd Estate from The Piazza 05 March 2009.
Elves post the Great Rain of Fire from The Piazza 06 March 2009.
The Shimmerling Lands - Estates from The Piazza 10 March 2009.
Mystara 2300 BC, Nations of the Known World from The Piazza 11 March 2009.
Mystara 2300 BC, Thoughts about the Cultures and Nations from The Piazza 13 March 2009.
Mystara 2300 BC Major Conflicts and Interactions - Azcan/M-Inca from The Piazza 13 March 2009.
Mystara 2300 BC Major Conflicts and Interactions - Kopru Dominarchy from The Piazza 13 March 2009.
Mystara 2300 BC Major Conflicts and Interactions - Taymora from The Piazza 16 March 2009.
Mistress Kerghyd from The Piazza 17 March 2009.
Mystara 2300 BC Major Conflicts and Interactions - Vulcanian Immigrants from The Piazza 18 March 2009.
Mystara 2300 BC Major Conflicts and Interactions - Urzud from The Piazza 19 March 2009.
Once in a blue moon..., Mystaran expressions and sayings from The Piazza posted 22 March 2009. (contributions also by Hervé Musseau, RobJN, Ville Lähde, Marco Fossati, Geoff Gander, Greg Weatherup and Roger LV Girtman II)
Thoughts About Kogolors from The Piazza 30 March 2009.
Map of Mystara 2300 BC from The Piazza 02 April 2009.
Kill Bargle! from The Piazza 25 May 2009.
Mystara 2300 BC The Shimmering Lands from The Piazza 29 May 2009.
History of Northern Darokin Forts from The Piazza 14 July 2009.
Nithian inspiration from The Piazza 25 July 2009.
The Origin of Worgs from The Piazza 29 July 2009.
Unique Mystaran Vessel - Stone Toad from The Piazza 29 July 2009.
Unique Mystaran Vessel - Lichcraft from The Piazza 30 July 2009.
Maps of the Known World and Taymora 2300 BC from The Piazza 11 August 2009.
Hollow Moon: Nation Overview from The Piazza 24 August 2009.
Mogreth, the Legend of Soolkhir from The Piazza 25 August 2009.
Map of the Hollow Moon, Albheldri Islands, 8 miles per hex from The Piazza 26 August 2009.
Bonds of Silver Part I: The Nephthisian Struggle against Taymora from The Piazza 28 August 2009.
Hollow Moon Timeline from The Piazza 03 September 2009.
BC 1700 Catastrophes from The Piazza 14 September 2009.
The Great Rain of Fire from The Piazza 15 September 2009.
Shadow Elf Lineages from The Piazza 02 October 2009.
St. Kruskiev's Gold: a Specularum adventure for 4-6 characters of levels 2-4 current as of 3 October 2009. (Design and development by Giampaolo Agosta)
Mogreth NPCs from The Piazza posted 07 October 2009. (NPCs also by Geoff Gander)
A Mustering at Nellyg's Noch from The Piazza 08 October 2009.
Modrigswerg timeline from The Piazza 08 October 2009.
Belcadiz Origin from The Piazza 10 October 2009.
Immortal Level Campaign Ideas from The Piazza 8 January 2010.
99 Bottles of Mystaran Beer on the Wall, Mystaran beverage and food items, from the Piazza posted 17 February 2010. (contributions also by JTR, Marco Fossati, Blacky the Blackball, Cab, Mike Phillips, Geoff Gander, Giampaolo Agosta, John Walter Biles, micky, Ville Lähde, Jamie Baty, Ashtagon and Sean Meaney)
Map of Taymora 2300 BC, 8 miles per hex from The Piazza 23 April 2010.
Map of Intua 2300 BC, 8 miles per hex from The Piazza 3 July 2010.
Map of Adhuza 2300 BC, 8 miles per hex from The Piazza 12 July 2010.
Tales from Mystara 2300 BC - Man of War from The Piazza 12 October 2010.
Map of Frontierlands 2300 BC, 8 miles per hex from The Piazza 20 December 2010.
Map of the Hollow Moon, Nearside, 40 miles per hex from The Piazza 31 January 2011.
Map of the Hollow Moon, Marsh of Putrescence, 8 miles per hex from The Piazza 5 February 2011.
Map of Platea, 8 miles per hex from The Piazza 14 September 2011.
Map of the Hinterlands, 24 miles per hex from The Piazza 14 April 2012.
Map of the Hollow Moon, Apennines of the Pteryx, 8 miles per hex from The Piazza 6 February 2011.
Map of the Hollow Moon, Aardovai Rilles, 8 miles per hex from The Piazza 3 March 2011.
Map of the Izondian Deep, 24 miles per hex from The Piazza 19 March 2011.
Map of the Hollow Moon, Vesperlands, 8 miles per hex from The Piazza 27 March 2011.
Map of Pelatan, 24 miles per hex from The Piazza 6 April 2011.
Map of the Known World BC 2000, 8mph from The Piazza 1 September 2011.
Map of the Known World BC 1750, 8mph from The Piazza 5 January 2012.
Map of the Known World BC 1720, 8mph from The Piazza 5 January 2012.
Map of the Known World BC 1700, 8mph from The Piazza 17 January 2012.
The Aardovai Rilles from The Piazza 20 January 2012.
Map of Hollow Moon, Maskelyne, 8 miles per hex from The Piazza 11 March 2012.
Map of Hollow Moon, Mauro, 8 miles per hex from The Piazza 21 March 2012.
Map of Hollow Moon, Adhuza, 8 miles per hex from The Piazza 29 March 2012.
Map of Grondheim 2300 BC, 8 miles per hex from The Piazza 15 July 2012.
World Map 2300 BC, non hex from The Piazza 1 October 2012.
Maps of the Shimmering Lands 2300 BC, 8 miles per hex from The Piazza 15 April 2013.
Map of Mogreth 2300 BC, 8 miles per hex from The Piazza 11 May 2013.