For me, the most misunderstood rule in my early days of roleplaying was Hit Dice or HD in AD&D. Here's why:
When my parents got me my AD&D books for my birthday way back when, I was given the Player's Handbook, the Dungeon Master's Guide and a set of dice. Notice something missing? Yep, the Monster Manual.
Not having the Monster Manual wasn't that big a deal - you had monster sumaries in the back of the DMG. Everything was listed, including HD. Not knowing what HD actually was, I assumed it meant Hit Points for Denizens or something. So, Orcs had 1 HD or 1 Hit Point. Ogres had 4+1, which was a silly way to saw 5 Hit Points, but who was I to argue.
Yes, those early days had monsters that were quite the pushover.
So, what rule or rules were your most misunderstood rules back in your early days of gaming?
Volo's Guide To All Things Magical -
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