Hi 'Mouser,
Last question first:
Although I do not scorn books written for a younger audience--such as Bellair's
Face in the Frost and the "Harry Potter" novels, ir even the non-fantasy boys' adventure book series by Leo Edwards, "Jerry Todd" and "Poppy Ott"--I have never before heard of Lloyd Alexander's stories about the land of Prydain. My loss I guess...
As to the tale of the black dragons in Castle Greyhawk, I do not want to go into great detail now, as something similar will be found in the Castle Zagyg dungeons ro begin publishing late this summer and on into 2008. Here is a precis of the tale.
My excellent veteran players--Ernie, Rob, Terry, and one or two others explored a level of the dungeons and accidentally discovered a series of secret chambers in which were stored treasure and magic items. They looted all of these repositories. Of course being greedy they searched for a new secret room...and found and deleased a dragon instead of wealth.
After failing to subdue it, taking breath damage twice, they ran for their lives. Robilar slung his subdued gargoyle flunkie over his back, and when the dragos spit acid at him, the gargoyle turned to goo, but Robilar took only one-quarter damage. He then have the dragon the slip, used his Boots of Flying to ascend a vertical shaft, but by random chance a purple worm was descendiing ths same route. Roblilar dropped down in a hurry, went for a normal exit passage, and was spotted by the dragon. At that Robilar ran full speed, forgetting there was a black pudding on the floor ahead, and his flying boots were "eaten."
As the rest of the party had escaped without loss, they returned for more loot. Instead they released a second dragon. After that the mated pair of drakes ruled the level and the adventurers shunned it assiduously. That saddened me as the DM, as the lot of them had gained a full level and about half the number of XPs to go on to the next.
What annoyed me most was that all of the different repositories were discovered by luck, the mapper thinkingthat he was leading the party to the original place each tome, but actually being off course. Naturally, luck lead them to the ones with much treasure before their greed brought them to the ones holding a dragon in stasis
Cheerio,
Gary