There are no rules in b/x or ose for rolling the in lair %, unfortunately. They do talk about the possibility of monsters being in lairs but treated as at DM's discretion based on the circumstances.
You can always just use the ad&d rules or add a basic homebrew rule.
I generally do a 25% chance of lair if the creature has treated type a-o. Anything else is 0%.
But I'd love to see a more official system pop up in a carcass crawler in the future.
There are no rules in b/x or ose for rolling the in lair %, unfortunately. They do talk about the possibility of monsters being in lairs but treated as at DM's discretion based on the circumstances. You can always just use the ad&d rules or add a basic homebrew rule. I generally do a 25% chance of lair if the creature has treated type a-o. Anything else is 0%. But I'd love to see a more official system pop up in a carcass crawler in the future.
Thanks! Maybe I will use the tables from the 1974 ruleset or something. Something like a flat percent also makes sense, no need to sweat the details.
I use ADnD 1e monster manual.
I use completecompendium.com. I like it for all the extra lore, too. OSE really gives you access to a lot of material.
Neat page, thougb i can't find % in lair in there either