So some of you may remember the OD&D Supplement I, Greyhawk (ported into 1st edition) size small/medium and large damage charts for weapons. Often a weapon would do less damage or sometimes more damage depending on the size of the target creature.
Well, Dave Hargrave decided there should be more of that and developed his weapon damage tables versus creature size in hit dice ranging from 1/2 a hit die or less up to 30+1 hit dice or more with TWELVE COLUMNS of variable damage by weapon type.
I coupled this information into a reference screen along with the weapon attack adjustment charts by armor class (another OD&D Supplement I/1st edition adjustment where certain weapons had better or worse capabilities to hit various armor types).
A Dave Hargrave original table I included has weapon breakage charts when weapons (even magical ones) strike very dense material such as stone golems or dragons. Which, heh, since the table is there anyway has piqued my thoughts about what sort of Arduin scenario I should run next con game.
In 1988 I wrote up a completely non-canonical "Dragon’s Throat" in Dead Watch Mountain, listed in Arduin's Recorded Areas of Treasure and Doom as "a known dragon abode." I used mostly Arduin critters on encounters, except all the dragons are just regular D&D Monster Manual dragons.
I think if I remedied that with Hargrave's Arduin dragon types I just might have something suitable for gaming. Ha, except the "Dragon's Throat" is sort of Tolkien Hobbit-derived from the secret passage entrance to Smaug's lair. Another thing I'll need to tidy...