Im playing through Trollshaws quest line and during the quest "The Riddle-master" when we need to find Celebrian's Vault, there is a dead troll close to the gem we need to get.
How did the troll get there ? We need to recite a poem to open the secret vault...dont think trolls have dat much intelligence huh

Image of the room :

https://lotro-wiki.com/images/thumb/...s_Legacy_2.jpg