Sacrosanct
Legend
That's a little disingenuous since ToH was made specifically to be deadly. ToH was a reaction to notable players saying they could beat any challenge and, which...hey, is just like this thread, only Gygax responded with more demi-liches and less gum flapping then we are here.
Well, that line was a bit tongue in cheek, but it doesn't change the fact that in AD&D, a house cat can kill a level 1 PC, and a 1 HD poisonous snake has a 50% chance of killing a 9th level PC in one hit. And that's not even getting into things like level drain or spells like disintegrate.