A stick?
Perhaps it's a prehistoric version of the Elder Wand.
If not, this "collector's edition" 'bonus' will certainly lead to debate. As usual I'm probably missing something here, but if not I can only hope that stick has some form of importance in the game's gameplay or story, in which case it was probably a bad idea to announce this bonus before showcasing the actual item's role in the game.
Now I'm just looking at... a stick?