So, if I were taking the
Oni (ogre mage), what would its abbreviated stats look like? Something like this?
Oni: Large giant; AC 16; HP 110; Saves Str +4, Dex +3, Con +6, Int +2, Wis +4, Cha +5; #Att 2 glaive, +7 (10 ft or 5 ft in Medium size), 2d10+4 slashing (or 1d10+4 in Medium size); senses 14 (darkvision 60 ft); change shape, magic weapons, regeneration (10); innate spells (at will –
darkness, invisibility, 1/day –
charm person, cone of cold, gaseous form, sleep; CR 7 (2,900 XP); Monster Manual.
More or less. The only thing I'd add would be the page number in the MM.
And then if an Oni appears elsewhere in the adventure 4 times, you repeat that abbreviated stat block each of those 4 times?
If two or more of the appearances happen to be on the same two-page spread then one could point to the other, where the stat block is (assuming they're exactly the same). Otherwise, 4 times it is.
What about much more complex monsters? Things like Archmages or Beholders?
The stat block has to go somewhere, no matter how big or elaborate it is. Put it in the creature's room description.
What about rooms where who is in the room changes significantly based on different times of day, ceremonial circumstances, etc?
That's messier. Anything that's based permanently in that room e.g. a guardian statue gets its stat block there. Otherwise, this is one case where just saying what's in the room when and pointing to the stat blocks for their lairs makes sense. It might look something like:
AREA 11 - MAIN TEMPLE ROOM <boxed description goes here>
OCCUPANTS - these vary as shown below:
Always present: Guardian Statue (1), HP 95, AC 17, <etc. - full stat block>
Present within one hour of any sunrise or sunset: Any surviving Clerics from area 13 (page 8), HP 29,27,31,34; AC 13 or 16
Present within one hour either side of noon: Any surviving acolytes from area 28 (page 15), HP 7 each; AC 12
Present during any ceremony (see development track page 2 for when these occur): all of the above plus Temple Master from area 31 (page 16), HP 78; AC 15 or 22
Present 30% of the time when no others are present: 1-3 Giant Rats from area 9 (page 6), HP 4 each; AC 12 - note that these will flee to area 9 on noticing anything other than a Giant Rat enter this area.
Howzat?
Lanefan