NewJeffCT said:
lots of things -
1) low level limits for non-humans and fewer class options;
2) weak monsters - the most powerful red dragon had 88 hit points, meaning it has potentially less hit points than four 1st level 1E rangers (each ranger gets 2d8 + Con)
And with a single breath, all 4 of those rangers would be killed, whether they made their saves or not. Pretty much anyone who failed that save was instantly dead. 88 or 44 damage. And they can do that 2 more times in a row.
Anyone who thinks an ancient red is a weak monster never fought one. Not to mention, characters are supposed to be able to kill dragons. They aren't supposed to be that tough. Its the three Ds: demons, devils, and demigods that are supposed to be tough.
NewJeffCT said:
3) XP for treasure
4) Stats for Gods, including that massive 64 HP goddess Lloth.
I could add more, but I'd have to rewind my memory.
As noted, it was 66 HPs and an AC of -10. Which means unless you were an 11+ level fighter or 16+ level cleric you won't be hitting her with anything besides a natural 20.
And all of this is ignoring her most important spell-like ability, the ability to
Heal thrice per day (which she could do as the equivalent of a swift action in 3.5 D&D).
The one time I heard of her actually being defeated in combat was a near TPK of a very high level party, which was saved only by a magic-user who got incredibly lucky with a Death spell, both penetrating her magic resistance, followed by her rolling a natural 1 for her saving throw.
And the net effect of all that? Banished from the plane for a century, and her current machinations foiled.
"Killing" her required either extraordinary luck as described above, or the entire party getting extremely lucky in melee in a single round. Anything else and the DM wasn't playing her right.
Her poison
web (as spell) + poison bite attack (at -4 or die) was her routine on a
weak round, when she was healing herself.