The tuatara doesn't- but it's one of the most basal surviving members of the clade that includes lizards but not crocodiles- Lepidosauromorpha.
Sharks have a similar trait- two "claspers" which do the same thing.
It helps in settings where a creature is very tough, and fire-resistant, to have something that isn't simply: "The red dragon with Fire Resist 30 dies when pushed into lava, no save" or similar.
Both the DMG and Champions of Ruin suggest that one evil act doesn't change alignment- it's consistantly doing evil acts that makes a character evil.
That said, consistantly doing both Good and Evil acts makes a character Evil, not Neutral.
Savage Species already dumps it- suggesting that Evil characters can be kind, loyal, altruistic, etc to their "in-group" and cruel and ruthless toward those not of that group.
So even in 3.0 and 3.5, alignment isn't exactly monolithic- Evil doesn't behave evilly toward everyone.
The lava rules are in Draconomicon: Chromatic dragons.
You take ongoing 20d6 fire damage for every round you remain in the magma. Characters who extract themselves from the fiery mess take 30 ongoing fire damage and are slowed (save ends both)
You also take appropriate falling damage if you...
It actually says in the spell descriptions that they detect hostility, not alignment.
In Eric Holmes Basic D&D though- there were 5 alignments (LG, CG, N, LE, CE)
And again, Detect Evil detected hostiles, only Know Alignment detected alignment.
I've managed to track down one Nodwick pic with Lolth in:
http://nodwick.humor.gamespy.com/gamespyarchive/index.php?date=2007-12-26
though there are others in Dragon. Not sure if they went up online though.
Drow style Lolth
I dunno- I like the drow-look pics somewhat.
EDIT:
I can't figure out how to spoiler it- I've tried the normal spoiler tags.
Apparently it's sblock, not spoiler
Shadowhunter bat is the 4E version of the dragazhar bat in Monsters of Faerun.
Swordwings, I think, were in MM5 (or something approximating them was) before appearing in 4E
Su-Monsters are a very old monster that was in 2nd ed but not 3rd ed- 4E brought them back. Think of them as vicious...
concepts
Some D&D monsters are strongly similar to Star Wars ones.
The Darfellan (Stormwrack) is very similar to the Herglic, only smaller- both are black and white humanoids of cetacean type.
And the Daelkyr from the Eberron Campaign Setting are much like the Vong in appearance (humanoid)...
Demands
In Tymora's Luck, Ilsensine demands a song he's never heard before from the minor deity Finder as the price for letting him go (Finder not only have to give the song, but all memory of it in his own head). Which is difficult since Ilsensine is a massive collector of knowledged and...