World of WarCraft
From Diablo Wiki
World of Warcraft is Blizzard Entertainment's massively popular, MMORPG. WoW, as it's commonly called, launched in 2004 in the US (2005 in Europe) and has grown to over 11.5 million subscriber world wide, as of late 2010.
- World of WarCraft: The Burning Crusade (Expansion #1) - 2007 EU & NA
- World of WarCraft: Wrath of the Lich King (Expansion #2) - 2008 EU & NA
- World of WarCraft: Cataclysm (Expansion #3) - 2010 EU & NA
- World of WarCraft: Mists of Pandaria (Expansion #4) - 2012 EU & NA
Diablo Easter Eggs in World of Warcraft
The following is quoted from WowWiki.com.  This list does not include the dozens of skills, monsters, quests, and other game elements directly derived from Diablo and Diablo 2.
- In reference to his demonic form in Frozen Throne, one of Illidan's gag quotes is "Wings, horns, hooves...what am I saying, is this Diablo?"
- An item called the 's Hide.
- An item called Wirt's Third Leg.
The first World of Warcraft expansion, the Burning Crusade, added a Diablo mini-pet as a reward for people who purchased the expansion. (Which means that absolutely everyone playing the game today has one.)
This pet follows, is very cute in a fierce sort of way, and has a fire-breathing "rest" animation.
A Tyrael mini-pet was added with a special conversion code given out to attendees to Blizzard's WWI 2008, in Paris. This code enabled the Tyrael mini-pet, who hovers along after the player, and can /dance, when required.
This was one of the rarest and most sought-after of all mini-pets at the time, with codes selling for upwards of $800 on eBay.
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