Let's see... an Elan doesn't die of old age, and has an ability by which it can go without food or water. That gives you a (mostly) humanoid opponent, even in a sealed dungeon (as long as there is a viable air supply). Apply a few levels of any class you like.I'm starting to set up for a new campaign soon and some advice would be appreciated.
I've got the first adventure all planned and at its end, the PCs are going to find an ancient ruin of a temple. One that will serve as the starting point of the main campaign plot.
I'm trying to decide on who or what will be the main obstacle there and could use some advice/suggestions. Here are the main points to consider:
1. This "dungeon" is just the basement level of a small temple that was buried over time (the rest of it is gone).
2. The temple was dedicated to a good-aligned angel of healing so it can't be full of deadly traps and evil guardians.
3. It's been sealed and lost for centuries, so there's no real traffic.
So really, given those conditions, I'm looking for something that makes sense and can be a fun encounter for a 1st level party (maybe 2nd).
Anyone feel like brainstorming with me?
I thought I might throw out a template notion that would fit with the buggy theme... the insectile template from Savage Species. Perhaps the derro was cursed in some manner to transform him. He wouldn't necessarily have to be evil - the fact that the PCs are going around mopping up his 'friends' would probably be sufficient to motivate him.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.