Originally Posted by The Vorpal Tribble
*feels the passing wind of something going over his head*
There's an ongoing discussion on the Gaming (d20) forum about the Druidzilla, and how Druids are the most powerful, heavily unbalanced core class in the game. Thus, the joke is a pun, based on the name of the Broken template- druids are broken, and it's easier to take a druid level than die horribly. Or more pleasant. Definately more broken.
Sorry to highjack your monster for an explanation of the joke, but I felt you'd like some form of explanation.
Oh, back on topic: why do they have piercing resistance? They don't have any bones, so it would seem their only weakness is their undead flesh, which is just as generally vulnerable to stabbing as slashing.