Expansion

Diablo II	Notation	Basic	Class	Skill	Item	Ally	Quest	Area	Monster	Tale

Diablo II	Classic	Expansion	Patch	Multiplayer	Single Player	Hardcore	Ladder	Difficulty
Resurrected		Reign of the Warlock	Patch (D2R)				Ladder (D2R)

Lord of Destruction expansion was released on 29 June 2001, one year to the day after the release of Diablo II. New characters are Expansion characters by default.
There are separate Ladders for Expansion and Expansion Hardcore. Titles awarded upon completion of each difficulty also differ:

Unless stated otherwise, all content of this wiki is valid for the current patch of the Expansion: all classes, items, allies, quests, areas and monsters are available. Some remaining differences between Classic and Expansion are outlined below.

Basic

Level < 20 characters cannot complete the Rite of Passage quest in Normal, and thus cannot complete Normal: for the same reason, level < 40 characters cannot complete Nightmare and level < 60 characters cannot complete Hell. Unhelpfully, the quest log does not reveal this until the Ancients have already been defeated once (although the level requirements are mentioned in the patch notes for 1.08).
Chance of Blocking is dependent on character level and Dexterity.
Resistance penalty is -40 in Nightmare and -100 in Hell.

Blessed Hammer is not enhanced by +% Damage applied by Might, and +% Damage from Concentration is halved.
Static Field cannot continue to be cast on targets with <= 33% life in Nightmare and <= 50% life in Hell.
Whirlwind attack rate is affected by weapon speed or Increased Attack Speed.

Different magic and rare affixes are available, including the following:
- Chance to Cast
- Charged suffixes