Green Knight said:
That doesn't simplify anything, though, because you'd still have to define which weapons can be used as a stake and which can't.
Anything that can be pushed into the ground and keep something there works as a stake. Mostly, that means stakes (wooden or otherwise). If the DM is generous, a sword or spear. Arrows are not strong enough to really work. I admit, it is not perfect, but it is still a
lot better than the "kill with a stake" alternative, in which (thanks to a certain popular TV show), people will argue that anything and everything made of wood is a "stake", regardless of original purpose or structure, so the word "stake" itself becomes meaningless, and you might as well say "wooden weapon", which is a lot less interesting.
Not to mention that you'd have to define what "keep him from rising" means. Does he stay there stuck like a bug with a pin through him? Can he remove the stake? Is he unconscious or concious? Paralyzed or in a coma? Can he interact with his surroundings in any meaningful way? Can he cast spells, etc? What exactly does "keep him from rising" mean?
It means that, while the vampires undead nature might not be fully gone, it is pretty much stuck being a normal corpse, and is effectively dead so long as the stake is in place. In other words, it is a set-up for the "grave-robbers unintentionally unleash the terrible evil" scenario. I am pretty sure that one or two Dracula movies start with some variant of this premise...
Also, the Vampire can not obviously remove the stake, since it would not be a weakness if he could.
Whatever the case, that'd still be pretty pointless considering the end result. And a vampire getting pinned in his coffin is pretty silly, as is the idea of going through all that trouble to pin a vampire to his coffin when you could instead kill him. If a stake through the heart does nothing but just stick him to the bottom of his coffin, then what's the point? You may as well just cut off his head and be done with it.
The idea in this case is that it is pretty hard to kill vampires. The stake through the heart has
always been the method used by frightened peasants or common scholars who can't confront the monster directly, but instead try to take advantage of the vampire's moment of weakness (when it is asleep in its coffin). Real heroes armed with powerful magic swords should never have to resort to this tactic, because they are tough enough to fight vampires directly.
To put it more clearly... It is people like Van Helsing from the original Dracula, common people who happen to know something of vampire lore, who use stakes through the heart. For strong heroes who fight vampires professionally, wooden stakes are unnecessary, as is proven by the Castlevania videogames.
