RFisher said:
"This door has been sealed for untold millenia. The only thing that could've survived in here would be constructs or the undead." Cue mad troll.
The idea is somehow interesting... and explains, why Trolls are ugly and brutal:
Once, millennia ago, a group of holy warriors has sworn to protect their leader, even in his grave. They enchanted themselves to become nigh-immortal, gaining the ability to regrow wounds, to regrow old tissue (staying young this way), but never realized the psychological impact of their powers:
Hunger. Thirst. Pain.
They're immune against the consequences of these dangers, but still felt them. After centuries, one warrior began to gnaw on his body to finally end the hunger, and the others followed his example. They mutilated themselves, knowing that they won't die, and over time, they became scarred by this - in mind and body. After some time, they have lost their sanity and began to sank into total depravity and mated... and they bred true, after centuries of the enchantment, and so, the first Troll was born - and he left the grave, together with the former warriors...
Hmmm... just a short write-up, but perhaps I'll snatch it for my (eternally unfinished) home-brew campaign.