The text on
Goblin Spear was worded as such on purpose, as to allow The Cave Troll to bear it, since he grabs a
Goblin Spear and strikes Frodo with it (thus, the burden-adding text as well, it's a really flavorful card, much more than the more-often played
Goblin Scimitar). Of course, the Balrog ended up being a side-effect, but wording it like "bearer must be The Cave Troll of Moria or..." was gonna be a huge pain, plus, it's one of those interactions PLAYERS are supposed to figure out.
I LOVED the turtle one, it sure DO looks like a turtle!