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John Calvin

Post Blackmoorian Character Class: Cyborg from the Mystara Mailing List posted 7 March 1999.

Blackmoor: Post Cataclysm from the Mystara Mailing List posted 21 March 1999.

Nithian Outposts from the Mystara Mailing List posted 26 March 1999.

The Lost Nation Series #1: Pyramid Down from Tome of Mystara issue 1 dated 29 June 1999.

The Alphatian Arts from the Mystara Mailing List posted 15 September 1999.

Hollow Moon Spells from the Mystara Mailing List posted 22 November 1999.

Enclave Timeline - Hidden Blackmoor from the Mystara Mailing List posted 29 November 1999.

Not Men, revised from the Mystara Mailing List posted 29 November 1999.

Thonian Gremlinate, Anti-Tech spells from the Mystara Mailing List posted 3 December 1999.

Night of the Blue Sun from Tome of Mystara issue 2 dated 14 January 2000.

A Treatise on the History of Lycanthropy from Tome of Mystara issue 2 dated 14 January 2000.

Catastrophe Myths from the Mystara Mailing List posted 20 January 2000.

Zen-Thara - Hidden Blackmoor from the Mystara Mailing List posted 23 January 2000.

Rivals of The Sun God: The Lost Nation, Part III from Tome of Mystara issue 3 dated 31 March 2000.

Aillucent's Laboratory from Tome of Mystara issue 4 dated 1 July 2000.

Wyrmsteeth Gazetteer Addendum by Giulio Caroletti and John Calvin, from Tome of Mystara issue 4 dated 1 July 2000.

Shadow Elves 3000 AC from the Mystara Mailing List posted 8 September 2000.

Notes to Dragon Society in Wyrmsteeth continued from the Mystara Mailing List posted 20 September 2000. (done with Giulio Caroletti)

Organisations in the Wyrmsteeth continued from the Mystara Mailing List posted 20 September 2000. (done with Giulio Caroletti)

The Known World 3000 AC from the Mystara Mailing List posted 21 September 2000.

Wyrmsinger, a prestige class for the Wyrmsteeth from the Mystara Mailing List posted 25 September 2000.

Art: Swanamutu from Tome of Mystara issue 6 dated 11 June 2001.

Brotherhood of the Aromatic Winds from Tome of Mystara issue 6 dated 11 June 2001.

The Corruption of the Swords Campaign from Tome of Mystara issue 6 dated 11 June 2001. (done with Max Monas and Jens "the Stalker" Schnabel)

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 posted 9 November 2001.

Alter Personal Climate from the Mystara Mailing List posted 26 November 2002.

Rafiel's Home Plane, revised from the Mystara Mailing List posted 9 March 2003.

Planar Warfare from the Mystara Mailing List posted 8 July 2003.

Lhondaras: Terra, Djaea and Ordana's homeplane from the Mystara Mailing List posted 29 July 2003.

The Eternal City: Khoronus's homeplane from the Mystara Mailing List posted 26 August 2003.

Campaigns through Time from the Mystara Mailing List posted 4 September 2003.

Imperialism and Conquest a tentative guideline to BC 1000 from the Mystara Mailing List posted 8 September 2003.

BC 500 plotlines from the Mystara Mailing List posted 26 September 2003.

Exiles Campaign from the Mystara Mailing List posted 20 January 2004.

Mystara related crystal spheres from the Mystara Mailing List posted 22 January 2004.

Mystara - Eberron crossover from the Mystara Mailing List posted 23 June 2004.

The Nucleus of the Spheres as a Touchstone from the Mystara Message Board posted 8 August 2004.

Hytiliaph from the Mystara Message Board posted 11 September 2004.

The Radiance Revisited from the Mystara Message Board posted 12 September 2004.

Adventure ideas - Working Against Hytiliaph from the Mystara Message Board posted 13 September 2004.

Hytiliaph's Mountain - Ancepes Trigeminus from the Mystara Message Board posted 13 September 2004.

Hytiliaph's Mountain - Secundancepes from the Mystara Message Board posted 2 October 2004.

Adventures on Secundancepes from the Mystara Message Board posted 10 October 2004.

Beyond Ancepes Trigeminus: the Fey Court from the Mystara Message Board posted 19 October 2004.

Frostburn in Mystara from the Mystara Message Board posted 19 October 2004.

Frostburn campaigns in Mystara from the Mystara Message Board posted 21 October 2004.

Mystaran libraries from the Mystara Mailing List posted 3 November 2004.

The Other Doomsday Device from the Mystara Message Board posted 30 July 2005.

Hytiliaph - Heredity table from the Mystara Message Board posted 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 (1000 AC) from The Piazza posted 26 July 2008.

Crests of the Clan of Alhambra (1000 AC) from The Piazza posted 3 August 2008.

Crests of the Clan of Ellerovyn (1000 AC) from The Piazza posted 3 August 2008.

Crests of the House of Crownguard (1000 AC) from The Piazza posted 23 August 2008.

Crests of the House of Igorov (1000 AC) from The Piazza posted 23 August 2008.

Crests of the The Kingdom of Alfheim (1000 AC) from The Piazza posted 27 August 2008.

Crests of the Kingdom of Karameikos (1000 AC) from The Piazza posted 2 September 2008.

Heraldic Crests from The Piazza posted 3 September 2008.

Mapping around Threshold from The Piazza posted 4 September 2008.

Mystaran Archaeology - Tools of the Trade from The Piazza posted 6 January 2009.

Tropos from The Piazza posted 22 January 2009.

Mystaran Villain Challenge from The Piazza posted 1 February 2009.

Crests of the Goblinoid Tribes of Karameikos from The Piazza posted 2 February 2009.

Adapting Curse of the Crimson Throne Adventure Path to Mystara from The Piazza posted 9 February 2009.

Map of Mogreth from The Piazza posted 3 March 2009.

Elves post the Great Rain of Fire from The Piazza posted 6 March 2009.

Mystara 2300 BC, Nations of the Known World from The Piazza posted 21 March 2009.

Mystara 2300 BC, Thoughts about the Cultures and Nations from The Piazza posted 23 March 2009.

Mystara 2300 BC Major Conflicts and Interactions - Azcan/M-Inca from The Piazza posted 23 March 2009.

Mystara 2300 BC Major Conflicts and Interactions - Kopru Dominarchy from The Piazza posted 23 March 2009.

Mystara 2300 BC Major Conflicts and Interactions - Taymora from The Piazza posted 26 March 2009.

Mystara 2300 BC Major Conflicts and Interactions - Vulcanian Immigrants from The Piazza posted 28 March 2009.

Mystara 2300 BC Major Conflicts and Interactions - Urzud from The Piazza posted 29 March 2009.

Once in a blue moon..., Mystaran expressions and sayings from The Piazza posted 22 March 2009. (contributions also by Hervé Musseau, Robert J. Nuttman, Jr., Ville Lähde, Marco Fossati, Geoff Gander, Greg Weatherup and Roger LV Girtman II)

Thoughts About Kogolors from The Piazza posted 30 March 2009.

Map of Mystara 2300 BC from The Piazza posted 2 April 2009.

Kill Bargle! from The Piazza posted 25 May 2009.

History of Northern Darokin Forts from The Piazza posted 24 July 2009.

Nithian inspiration from The Piazza posted 25 July 2009.

The Origin of Worgs from The Piazza posted 29 July 2009.

Unique Mystaran Vessel - Stone Toad from The Piazza posted 29 July 2009.

Unique Mystaran Vessel - Lichcraft from The Piazza posted 30 July 2009.

Maps of the Known World and Taymora 2300 BC from The Piazza posted 21 August 2009.

Hollow Moon: Nation Overview from The Piazza posted 24 August 2009.

Mogreth, the Legend of Soolkhir from The Piazza posted 25 August 2009.

Map of the Hollow Moon, Albheldri Islands, 8 miles per hex from The Piazza posted 26 August 2009.

Bonds of Silver Part I: The Nephthisian Struggle against Taymora from The Piazza posted 28 August 2009.

Bathymetric contour map of the Known World and Sea of Dread from The Piazza posted 2 September 2009.

Map of the seas and canals of Vaniae from The Piazza posted 5 September 2009.

Races of Vaniae from The Piazza posted 6 September 2009.

BC 1700 Catastrophes from The Piazza posted 24 September 2009.

The Great Rain of Fire from The Piazza posted 25 September 2009.

Shadow Elf Lineages from The Piazza posted 2 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 7 October 2009. (NPCs also by Geoff Gander)

Modrigswerg timeline from The Piazza posted 8 October 2009.

Belcadiz Origin from The Piazza posted 20 October 2009.

Immortal Level Campaign Ideas from The Piazza posted 8 January 2010.

Dead Immortals from The Piazza posted 5 February 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 Davidson, Mike Phillips, Geoff Gander, Giampaolo Agosta, John Walter Biles, Michael Berry, Ville Lähde, Jamie Baty, Ashtagon and Sean Meaney)

The Vaniae Setting from The Piazza posted 3 March 2010.

Possible setting villains of Vaniae from The Piazza posted 3 March 2010.

Map of Vaniae, 72 miles per hex superimposed over Mars from The Piazza posted 8 March 2010.

Map of Vaniae with national borders, 72 miles per hex from The Piazza posted 10 March 2010.

Map of Intua 2300 BC, 8 miles per hex from The Piazza posted 3 July 2010.

Map of Adhuza 2300 BC, 8 miles per hex from The Piazza posted 22 July 2010.

Nations of Vaniae from The Piazza posted 29 July 2010.

Mystara 2300BC: Band of the Lantern from The Piazza posted 5 August 2010.

Tales from Mystara 2300 BC - Man of War from The Piazza posted 22 October 2010.

Timeline for Cathos and Vacros from The Piazza posted 29 November 2010.

Map of Frontierlands 2300 BC, 8 miles per hex from The Piazza posted 20 December 2010.

Hollow Moon Timeline from The Piazza posted 22 January 2011.

Map of the Hollow Moon, Nearside, 40 miles per hex from The Piazza posted 31 January 2011.

Map of the Hollow Moon, Marsh of Putrescence, 8 miles per hex from The Piazza posted 5 February 2011.

Mystara 2300BC: Crew of the Red Tide from The Piazza posted 5 April 2011.

Map of Platea, 8 miles per hex from The Piazza posted 24 September 2011.

Map of the Hinterlands, 24 miles per hex from The Piazza posted 24 April 2012.

Map of the Hollow Moon, Apennines of the Pteryx, 8 miles per hex from The Piazza posted 6 February 2011.

Map of the Hollow Moon, Aardovai Rilles, 8 miles per hex from The Piazza posted 3 March 2011.

Map of the Izondian Deep, 24 miles per hex from The Piazza posted 29 March 2011.

History of Thothia and Aran from The Piazza posted 5 April 2011.

Map of Pelatan, 24 miles per hex from The Piazza posted 6 April 2011.

Mystaran monsters and villains from The Piazza posted 16 July 2011. (contributions also by Blacky the Blackball, Andrew Theisen, Robert J. Nuttman, Jr., Simone Neri, Cab Davidson, JTrithen and Snorri).

Iconic Items of Lost Civilizations from The Piazza posted 31 August 2011. (contributions also by DJ Hartel, Geoff Gander, Giampaolo Agosta and mister c)

Map of the Known World BC 2000, 8mph from The Piazza posted 2 September 2011.

Mystaran National/Cultural Timeline from The Piazza posted 7 September 2011.

Map of the Known World BC 1750, 8mph from The Piazza posted 5 January 2012.

Map of the Known World BC 1720, 8mph from The Piazza posted 5 January 2012.

Map of the Known World BC 1700, 8mph from The Piazza posted 27 January 2012.

The Aardovai Rilles from The Piazza posted 20 January 2012.

Threats to the Aardovai Rilles from The Piazza posted 23 January 2012.

Thoughts about Loktal's megadungeon from The Piazza posted 30 January 2012.

Hollow Moon: Adventure Ideas from The Piazza posted 20 March 2012.

Map of Hollow Moon, Adhuza, 8 miles per hex from The Piazza posted 29 March 2012.

Mystaran Sliders from The Piazza posted 20 April 2012. (contributions also by Robert J. Nuttman, Jr., LoZompatore, DJ Hartel, Ashtagon, Ripvanwormer, Geoff Gander and Roger LV Girtman II)

Map of the Mystaran Cluster of spheres from The Piazza posted 26 June 2012.

Map of Grondheim 2300 BC, 8 miles per hex from The Piazza posted 25 July 2012.

Caurenze's Crisis from The Piazza posted 9 August 2012. (in addition to Giulio Frandi)

Voyage of the Princess Ark (fan derivative) Episode Guide from The Piazza posted 2 September 2012.

World Map 2300 BC, non hex from The Piazza posted 2 October 2012.

Maps of the Shimmering Lands 2300 BC, 8 miles per hex from The Piazza posted 25 April 2013.

Mystara 2300 BC: GazBC1 Shimmering Lands DM's Guide current as of 22 April 2013.

Tabernacle of Gildesh from The Piazza posted 29 April 2013.

Map of Mogreth 2300 BC, 8 miles per hex from The Piazza posted 21 May 2013.

Immortals of Taymora from The Piazza posted 1 June 2013.

Mystara 2300 BC: GazBC1 Shimmering Lands Player's Guide current as of 2 June 2013.

Taymora: Major City States from The Piazza posted 5 June 2013.

Taymora: Empire of the Dead title page from The Piazza posted 7 June 2013.

Taymora: Major Conflicts/Plot Lines from The Piazza posted 10 June 2013.

Goblin War Chariot current as of 10 June 2013. [done with John Walter Biles and Rodger Burns]

Taymoran Society from The Piazza posted 19 June 2013.

Mystara 2300 BC: Campaign Setting version 1.1 current as of 22 June 2013. (done with Geoff Gander)

Map of Ochalea, 8 miles per hex from The Piazza posted 23 June 2013.

Races of Taymora from The Piazza posted 26 June 2013.

Taymora Timeline from The Piazza posted 1 July 2013.

Taymoran Migration Map from The Piazza posted 7 July 2013.

Books of the Known World from The Piazza posted 22 October 2013. (with additions by Jesper Andersen, Geoff Gander, Giampaolo Agosta, AllanP and Peet)

Yuri Molotov - Death Knight from Threshold Magazine issue 1 dated 30 September 2013.

Once, In a Blue Moon: Return to the Hollow Moon from Threshold Magazine issue 2 dated 13 January 2014.

Threshold Magazine Editorial from Threshold Magazine issue 3 dated 25 March 2014.

Threshold Magazine Editorial from Threshold Magazine issue 4 dated 30 June 2014.

Once in a Blue Moon part 2 from Threshold Magazine issue 4 dated 30 June 2014.

Threshold Magazine Editorial from Threshold Magazine issue 9 dated 21 September 2015.

Children of Azca from Threshold Magazine issue 9 dated 21 September 2015.

Seshay-Selene, patroness of the Hollow Moon (Blue Moon 3) from Threshold Magazine issue 9 dated 21 September 2015.

Zetacaalpa, Seer of Ages from Threshold Magazine issue 9 dated 21 September 2015.

Immortal Symbols from The Piazza posted 13 October 2015.

Known World Area circa BC 1000 from The Piazza posted 8 January 2016.

Vesperlands Atlas (Blue Moon 4) from Threshold Magazine issue 10 dated 8 January 2016.

Threshold Magazine Editorial from Threshold Magazine issue 12 dated 14 July 2016.

Time Travelling in Mystara from Threshold Magazine issue 12 dated 14 July 2016.

Vampire Queens of Taymora from Threshold Magazine issue 12 dated 14 July 2016.

Jaime Honey-Creeper Ahua from The Piazza posted 25 June 2016.

Tayma and the Ceremony of Blood from The Piazza posted 15 July 2016.

Undead of Elegy Island from Threshold Magazine issue 13 dated 18 October 2016. (done with Giampaolo Agosta and Francesco Defferrari)

Treatise on the History of Lycanthropy from Threshold Magazine issue 13 dated 18 October 2016.

Nations of the Duskward Rim (Blue Moon 5) from Threshold Magazine issue 13 dated 18 October 2016.

Time's Travels: Escape from Mogreth part 1: page 1, page 2; part 2: page 1, page 2; part 3: page 1, page 2; part 4: page 1, page 2; part 5: page 1, page 2; part 6: page 1, page 2; part 7: page 1, page 2; and part 8: page 1, page 2, from Threshold Magazine, last entry issue 13 dated 18 October 2016.

Map of the Hollow Moon, Independent Trade Cities, 8 miles per hex from The Piazza posted 1 January 2017.

Map of the Hollow Moon, Cacklogallinia, 8 miles per hex from The Piazza posted 1 January 2017.

Map of the Hollow Moon, Crisium Shark-kin, 8 miles per hex from The Piazza posted 1 January 2017.

Map of the Hollow Moon, Vesperlands, 8 miles per hex from The Piazza posted 2 January 2017.

Map of the Hollow Moon, Mauro, 8 miles per hex from The Piazza posted 2 January 2017.

Map of the Hollow Moon, Vedal, 8 miles per hex from The Piazza posted 2 January 2017.

Map of the Sea of Dread, 8 miles per hex 1000 AC from The Piazza posted 20 January 2017.

Map of the Sea of Dread: Undersea, 8 miles per hex 1000 AC from The Piazza posted 20 January 2017.

Map of the Hollow Moon, Maskelyne, 8 miles per hex from The Piazza posted 25 February 2017.

Map of the Hollow Moon, Margasta Tribelands, 8 miles per hex from The Piazza posted 25 February 2017.

Threshold Magazine Editorial from Threshold Magazine issue 15 dated 14 April 2017.

Sharon Dornhoff Interview from Threshold Magazine issue 15 dated 14 April 2017.

Hollow Moon - A Quick Reference Guide from Threshold Magazine issue 15 dated 14 April 2017.

Once in a Blue Moon - Nations of the Midlands from Threshold Magazine issue 15 dated 14 April 2017.

Flight of the Nachtklaue from Threshold Magazine issue 15 dated 14 April 2017.

The Exiles Campaign Setting from Threshold Magazine issue 15 dated 14 April 2017.

Thoughts on Rockhome Dwarves and Nithians from The Piazza posted 20 April 2017.

Engdyr’s Game Adventure Path from The Piazza posted 12 July 2017.

Darmouk from Threshold Magazine issue 16 dated 28 July 2017. (done with Giampaolo Agosta)

Jyrdri Kerghid, the Mad Mistress from Threshold Magazine issue 16 dated 28 July 2017.

Engdyr’s Game Intro from Threshold Magazine issue 16 dated 28 July 2017.

Engdyr’s Game - Races from The Piazza posted 7 August 2017.

Engdyr’s Game part 1 - Journey North from Threshold Magazine issue 17 dated 27 October 2017.

Engdyr’s Game II - Ruins of Layhash from Threshold Magazine issue 18 dated 31 January 2018.

Editorial and Cover Art from Threshold Magazine issue 19 dated 14 May 2018. (done with I. Calvin)

Atlas of the Elemental Planes from Threshold Magazine issue 19 dated 14 May 2018. (done with Håvard)

Thoughts about the Archons of Bettellyn from The Piazza posted 11 May 2018.

Reidyll from Threshold Magazine issue 19 dated 14 May 2018.

St Kruskiev's Gold from Threshold Magazine issue 21 dated 20 October 2018. (done with Giampaolo Agosta)

Alphatian History from The Piazza posted 23 July 2019.

Alphatian Skyships: Bettellyn Archonship from The Piazza posted 26 July 2019.

Clans of Foresthome from The Piazza posted 26 July 2019.

Holy Sites in BC 2300: Shimmering Lands from The Piazza posted 29 August 2019.

Map of Taymora 2300 BC, 8 miles per hex from The Piazza posted 3 June 2020.

Taymora - The Western States from The Piazza posted 22 June 2020.

Map of the Taurus Gnomes, 8 miles per hex from The Piazza posted 15 November 2020.

Map of the Hollow Moon, Modrigswerg Lands, 8 miles per hex from The Piazza posted 16 November 2020.

Map of the Hollow Moon, Wallara Dreamlands, 8 miles per hex from The Piazza posted 19 November 2020.

Gildesh from The Piazza posted 19 November 2020.

Map of the Hollow Moon, Ur-Carnifex Tribelands, 8 miles per hex from The Piazza posted 28 November 2020.

Reintroduction of Iron into the Ancient World from The Piazza posted 1 December 2020.

Map of the Hollow Moon, Sohktar, 8 miles per hex from The Piazza posted 3 December 2020.

Antalia 2300 BC from The Piazza posted 3 December 2020.

Antalia 2300 BC timeline from The Piazza posted 3 December 2020.

Antalia 2300 BC - Resources from The Piazza posted 6 December 2020.

Alphatian Vampires from The Piazza posted 7 December 2020.

[5E] Using Ravnica in BC 2300 from The Piazza posted 21 December 2020.