Diablo 2 Patch 1.13c

So basically, there's a new item which is created when four other new items are transmuted in the cube. These four items drop from the act bosses in hell difficulty. Andariel and duriel drop the same one, and the other three each come from the three brothers. These have approximately 1/10 chance to drop (it's actually like 1/11 or 1/13 or something but whatever). As far as I know, the individual items do nothing, but when they're transmuted together they create an item that allows you to reset your skill points as if you hadn't ever spent any. In addition to this method of resetting skills, you can also reset your skills once for every time you do the Den of Evil quest (once per difficulty) by talking to Akara after-the-fact.

Oh, and there was a ladder reset.