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Joe Not Charles
Entropic Spheres, and immortals by sphere from the Mystara Message Board posted 21 September 2005.
Mystaran Immortal equivalents of 4E Gods from The Piazza posted 8 July 2008.
4E adventures adapted for Mystara from The Piazza posted 9 July 2008.
Tieflings in Mystara from The Piazza posted 9 July 2008.
Soul Eater, 4E from The Piazza posted 4 January 2009.
Altered Savage Coast 4E campaign from The Piazza posted 7 February 2009.
Converting BECMI's 36 levels to 30 from The Piazza posted 31 July 2009.
The Weapon Mastery Pyramid from The Piazza posted 22 June 2011.