System Mastery is a both a property and podcast with two hosts, Jef and Jon. The series proper, System Mastery, revolves around Jef and Jon reading old RPG books and discussing the their settings and mechanics.

System Mastery Sub-Series

Jef and Jon host a variety of other serials.

  • Movie Mastery
  • Expounded Universe
  • Afterthought

System Mastery's Memes

System Mastery has improvised some rather

  • Chester Baloonman
  • Donkey Talk
  • Helga the Punch Witch
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